Population and growth
From the U.S. Census Bureau: census counts, population estimates, the American Community Survey and the Building Permits Survey. How these figures are built
How many people live in Tiffin and how fast the town has grown, from the Census Bureau's own figures: the count every ten years, the yearly estimates in between, survey estimates of income, housing and commuting, and the new homes the city permitted each year. The city boundary page shows how the town's land grew.
The 2020 Census counted 4,512 people in Tiffin, up from 1,947 in 2010. The Census Bureau estimates 7,156 on July 1, 2025 Estimate: 3.7 times the 2010 count. Since 2010 the city has issued permits for 2,700 new housing units.
Population over time
Points: the census count of each decade (April 1). Line: the Census Bureau's estimate for July 1 of each year from 2000. Every figure is in the tables below.
The census counts
Every ten years the census counts everyone living in the town on April 1. Tiffin first appears in 1910.
| Census | Population | Change Derived | Change, % Derived | Source |
|---|---|---|---|---|
| 2020 | 4,512 | 2,565 | +131.7% | 2020 Census Redistricting Data (Public Law 94-171) |
| 2010 | 1,947 | 972 | +99.7% | 2010 Census Summary File 1 |
| 2000 | 975 | 515 | +112.0% | Census 2000 Summary File 1 |
| 1990 | 460 | 47 | +11.4% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1980 | 413 | 114 | +38.1% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1970 | 299 | -12 | -3.9% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1960 | 311 | 55 | +21.5% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1950 | 256 | 16 | +6.7% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1940 | 240 | 34 | +16.5% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1930 | 206 | 28 | +15.7% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1920 | 178 | 2 | +1.1% | Total Population for Iowa's Incorporated Places: 1850-2000 |
| 1910 | 176 | Total Population for Iowa's Incorporated Places: 1850-2000 |
Who lived here: 2000, 2010 and 2020
The census's basic tables, as published. Race and Hispanic origin are as people reported them; "alone" means one race only. The 2020 figures other than housing units carry the Census Bureau's privacy protection ("differential privacy"), which adds small random changes to small areas' counts.
| Subject | 2000 | 2010 | 2020 |
|---|---|---|---|
| People | |||
| Total population | 975 | 1,947 | 4,512 |
| Under 18 years | 225 23% | 534 27% | 1,241 28% |
| 65 years and over | 65 7% | 131 7% | 366 8% |
| Median age (years) | 30.1 | 31.2 | 31.8 |
| Homes | |||
| Housing units | 457 100% | 848 100% | 1,978 100% |
| Occupied housing units (households) | 440 96% | 800 94% | 1,749 88% |
| Vacant housing units | 17 4% | 48 6% | 229 12% |
| Owner-occupied units | 295 65% | 570 67% | 1,215 61% |
| Renter-occupied units | 145 32% | 230 27% | 534 27% |
| Race and Hispanic origin | |||
| Hispanic or Latino (of any race) | 23 2% | 70 4% | 248 5% |
| White alone, not Hispanic or Latino | 913 94% | 1,743 90% | 3,672 81% |
| Black or African American alone, not Hispanic or Latino | 19 2% | 47 2% | 221 5% |
| Asian alone, not Hispanic or Latino | 13 1% | 30 2% | 109 2% |
| American Indian and Alaska Native alone, not Hispanic or Latino | 0 0% | 5 0% | 13 0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino | 1 0% | 0 0% | 2 0% |
| Some other race alone, not Hispanic or Latino | 0 0% | 0 0% | 17 0% |
| Two or more races, not Hispanic or Latino | 6 1% | 52 3% | 230 5% |
Percentages Derived: of the population (people, race and origin) or of all housing units (homes). Variables: 2000 Census 2000 Summary File 1; 2010 2010 Census Summary File 1; 2020 2020 Census Demographic and Housing Characteristics File.
Yearly estimates
Between censuses the Census Bureau estimates each town's population for July 1 from births, deaths, migration and new housing. After each census it revises the decade's estimates to meet the new count ("intercensal" estimates); the years since 2020 are not revised yet and change with each year's release. An estimate is not a count.
Every estimate (26)
Survey estimates: the American Community Survey
These are survey estimates for 2020-2024, not counts. Tiffin is small, so the margins of error are wide: read each figure as a range. The American Community Survey asks a sample of households each year; a 5-year estimate pools five years of answers, so it describes the period, not one year, and for a town of Tiffin's size the sample is small. The margin of error is the Census Bureau's 90% confidence range: the true figure is probably within the estimate plus or minus that amount. Two estimates whose ranges overlap may not differ at all, and overlapping 5-year periods share most of their answers, so they should not be compared year to year. Dollar figures are in each period's last year's dollars (not adjusted for inflation across periods).
| Subject | Estimate Estimate | Margin of error (90%) | Likely range |
|---|---|---|---|
| Total population | 5,737 | ± 18 | 5,719 to 5,755 |
| Median age (years) | 33.0 | ± 2.8 | 30.2 to 35.8 |
| Households | 2,406 | ± 217 | 2,189 to 2,623 |
| Average household size | 2.38 | ± 0.21 | 2.17 to 2.59 |
| Median household income | $100,952 | ± $25,401 | $75,551 to $126,353 |
| Housing units | 2,406 | ± 217 | 2,189 to 2,623 |
| Owner-occupied share of occupied units | 80.2% | ± 7.4% | 72.8% to 87.6% |
| Median value of owner-occupied homes | $338,500 | ± $29,663 | $308,837 to $368,163 |
| Median gross rent | $1,224 | ± $187 | $1,037 to $1,411 |
| Mean travel time to work (minutes) | 22.1 | ± 3.7 | 18.4 to 25.8 |
| Workers who drove alone | 78.5% | ± 6.3% | 72.2% to 84.8% |
| Workers who worked from home | 18.6% | ± 5.6% | 13.0% to 24.2% |
| High school graduate or higher (age 25+) | 100.0% | ± 0.7% | 99.3% to 100.0% |
| Bachelor's degree or higher (age 25+) | 63.6% | ± 8.5% | 55.1% to 72.1% |
The ACS total population is the survey's own figure, averaged over five years and weighted to the county's estimates; it differs from the yearly estimate above (July 1, 2025: 7,156), which is the figure to use for a single year.
Every 5-year period, 2005-2009 to 2020-2024
| Subject | 2020-2024 | 2019-2023 | 2018-2022 | 2017-2021 | 2016-2020 | 2015-2019 | 2014-2018 | 2013-2017 | 2012-2016 | 2011-2015 | 2010-2014 | 2009-2013 | 2008-2012 | 2007-2011 | 2006-2010 | 2005-2009 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total population | 5,737 ± 18 | 5,271 ± 16 | 4,845 ± 32 | 4,482 ± 29 | 3,779 ± 19 | 3,351 ± 24 | 3,008 ± 23 | 2,746 ± 24 | 2,530 ± 42 | 2,358 ± 22 | 1,921 ± 300 | 1,913 ± 276 | 1,857 ± 267 | 1,977 ± 306 | 1,986 ± 292 | 1,630 ± 240 |
| Median age (years) | 33.0 ± 2.8 | 33.0 ± 2.6 | 31.6 ± 4.5 | 32.3 ± 3.6 | 30.7 ± 4.3 | 32.7 ± 2.9 | 32.4 ± 2.1 | 31.4 ± 4.1 | 30.4 ± 3.3 | 32.0 ± 2.5 | 32.5 ± 2.5 | 33.9 ± 4.1 | 32.0 ± 2.7 | 33.0 ± 2.9 | 32.6 ± 3.3 | 32.1 ± 2.5 |
| Households | 2,406 ± 217 | 2,110 ± 193 | 1,795 ± 171 | 1,755 ± 184 | 1,518 ± 160 | 1,307 ± 101 | 1,190 ± 90 | 1,093 ± 94 | 1,074 ± 126 | 1,022 ± 97 | 832 ± 106 | 849 ± 111 | 818 ± 106 | 833 ± 125 | 812 ± 93 | 657 ± 83 |
| Average household size | 2.38 ± 0.21 | 2.50 ± 0.23 | 2.70 ± 0.26 | 2.55 ± 0.27 | 2.49 ± 0.26 | 2.56 ± 0.20 | 2.53 ± 0.19 | 2.51 ± 0.22 | 2.36 ± 0.27 | 2.31 ± 0.22 | 2.31 ± 0.26 | 2.25 ± 0.19 | 2.27 ± 0.21 | 2.37 ± 0.18 | 2.45 ± 0.18 | 2.48 ± 0.21 |
| Median household income | $100,952 ± $25,401 | $106,034 ± $20,110 | $94,011 ± $27,465 | $85,826 ± $24,906 | $77,634 ± $11,222 | $78,713 ± $7,031 | $76,250 ± $9,606 | $67,650 ± $12,229 | $58,750 ± $16,411 | $57,125 ± $14,441 | $51,000 ± $21,013 | $51,484 ± $16,328 | $48,929 ± $7,051 | $51,250 ± $10,773 | $56,500 ± $5,682 | $58,224 ± $4,856 |
| Housing units | 2,406 ± 217 | 2,186 ± 215 | 1,946 ± 195 | 1,914 ± 199 | 1,676 ± 182 | 1,473 ± 145 | 1,298 ± 115 | 1,166 ± 102 | 1,121 ± 133 | 1,063 ± 103 | 898 ± 107 | 920 ± 104 | 872 ± 112 | 896 ± 130 | 879 ± 98 | 702 ± 87 |
| Owner-occupied share of occupied units | 80.2% ± 7.4% | 80.8% ± 8.4% | 85.8% ± 5.8% | 80.6% ± 6.6% | 75.8% ± 5.9% | 67.6% ± 5.4% | 65.4% ± 7.1% | 63.6% ± 8.0% | 66.3% ± 8.1% | 67.5% ± 7.2% | 72.5% ± 7.2% | 74.4% ± 6.9% | 74.4% ± 6.8% | 73.3% ± 6.1% | 74.9% ± 6.0% | 73.8% ± 7.2% |
| Median value of owner-occupied homes | $338,500 ± $29,663 | $315,800 ± $39,964 | $295,800 ± $29,130 | $251,300 ± $34,804 | $220,900 ± $19,921 | $233,000 ± $15,439 | $231,300 ± $17,997 | $203,900 ± $16,700 | $186,000 ± $22,407 | $176,200 ± $16,784 | $179,000 ± $23,856 | $175,300 ± $34,136 | $146,000 ± $35,654 | $158,200 ± $28,858 | $158,600 ± $21,484 | $161,800 ± $15,842 |
| Median gross rent | $1,224 ± $187 | $1,367 ± $390 | $1,152 ± $68 | $1,128 ± $72 | $1,055 ± $106 | $994 ± $76 | $987 ± $73 | $964 ± $35 | $968 ± $69 | $953 ± $49 | $920 ± $87 | $947 ± $75 | $922 ± $72 | $859 ± $35 | $845 ± $28 | $825 ± $28 |
| Mean travel time to work (minutes) | 22.1 ± 3.7 | 20.1 ± 2.9 | 20.3 ± 3.2 | 18.5 ± 2.4 | 18.7 ± 2.0 | 19.5 ± 2.3 | 19.4 ± 2.5 | 20.0 ± 2.8 | 20.3 ± 2.6 | 20.6 ± 2.3 | 19.5 ± 2.3 | 19.1 ± 2.6 | 18.1 ± 1.4 | 17.6 ± 1.6 | 16.8 ± 1.5 | 17.3 ± 1.5 |
| Workers who drove alone | 78.5% ± 6.3% | 79.6% ± 6.2% | 80.4% ± 5.6% | 82.3% ± 5.8% | 90.9% ± 4.1% | 91.6% ± 3.4% | 90.4% ± 4.5% | 89.1% ± 4.2% | 88.0% ± 4.9% | 88.2% ± 4.6% | 89.7% ± 4.0% | 91.4% ± 3.9% | 89.4% ± 4.5% | 89.3% ± 4.4% | 87.4% ± 4.4% | 85.1% ± 6.2% |
| Workers who worked from home | 18.6% ± 5.6% | 17.1% ± 5.8% | 16.2% ± 6.1% | 15.1% ± 5.9% | 5.5% ± 3.7% | 4.3% ± 2.4% | 4.2% ± 2.8% | 2.9% ± 1.8% | 2.5% ± 1.9% | 3.8% ± 2.2% | 2.9% ± 2.2% | 2.8% ± 2.1% | 3.8% ± 2.7% | 2.8% ± 1.8% | 1.9% ± 1.6% | 2.2% ± 2.2% |
| High school graduate or higher (age 25+) | 100.0% ± 0.7% | 98.6% ± 2.1% | 95.6% ± 4.0% | 92.9% ± 4.7% | 90.9% ± 4.5% | 93.2% ± 3.9% | 92.5% ± 3.8% | 93.2% ± 4.6% | 96.7% ± 3.4% | 97.3% ± 3.1% | 94.3% ± 4.8% | 96.2% ± 3.0% | 95.9% ± 3.3% | 94.1% ± 3.5% | 93.4% ± 3.6% | 94.7% ± 3.6% |
| Bachelor's degree or higher (age 25+) | 63.6% ± 8.5% | 60.6% ± 8.2% | 48.3% ± 10.0% | 42.8% ± 9.1% | 33.8% ± 6.8% | 34.6% ± 7.5% | 30.9% ± 8.0% | 31.7% ± 6.8% | 30.5% ± 7.1% | 33.0% ± 6.2% | 33.6% ± 7.5% | 35.0% ± 7.0% | 35.6% ± 7.6% | 34.9% ± 8.2% | 35.0% ± 7.5% | 32.9% ± 7.2% |
New homes permitted
The Building Permits Survey asks each permit office for the new housing units it authorized each year, by kind of building, with the construction value on the permits. A year the city did not report every month is completed by the Census Bureau's estimate (imputation), marked below with the months the city reported; a permit is not a finished home.
| Year | Units | Units | Value on the permits | Months reported |
|---|---|---|---|---|
| 2025 | 206 | $52.6M | 4 of 12; rest estimated Estimate | |
| 2024 | 244 | $59.4M | 10 of 12; rest estimated Estimate | |
| 2023 | 172 | $43.7M | 12 | |
| 2022 | 285 | $54.5M | 12 | |
| 2021 | 271 | $57.3M | 0 of 12; rest estimated Estimate | |
| 2020 | 280 | $55.8M | 12 | |
| 2019 | 211 | $38.9M | 12 | |
| 2018 | 259 | $44.5M | 12 | |
| 2017 | 146 | $27.0M | 12 | |
| 2016 | 175 | $25.9M | 0 of 12; rest estimated Estimate | |
| 2015 | 183 | $27.2M | 12 | |
| 2014 | 91 | $11.3M | 12 | |
| 2013 | 34 | $6.80M | 12 | |
| 2012 | 37 | $6.65M | 12 | |
| 2011 | 77 | $8.91M | 12 | |
| 2010 | 29 | $4.64M | 12 | |
| 2009 | 36 | $4.73M | 12 | |
| 2008 | 35 | $5.37M | 12 | |
| 2007 | 34 | $6.01M | 12 | |
| 2006 | 24 | $3.80M | 12 | |
| 2005 | 45 | $4.74M | 1 of 12; rest estimated Estimate | |
| 2004 | 49 | $4.92M | 12 | |
| 2003 | 26 | $3.00M | 0 of 12; rest estimated Estimate | |
| 2002 | 25 | $2.88M | 12 | |
| 2001 | 90 | $6.78M | 0 of 12; rest estimated Estimate | |
| 2000 | 78 | $8.10M | 0 of 12; rest estimated Estimate | |
| 1999 | 79 | $6.90M | 0 of 12; rest estimated Estimate | |
| 1998 | 64 | $5.85M | 12 | |
| 1997 | 63 | $5.55M | 12 | |
| 1996 | 69 | $5.93M | 12 | |
| 1995 | 29 | $2.61M | 12 | |
| 1994 | 20 | $1.40M | 12 | |
| 1993 | 3 | $250k | 12 | |
| 1992 | 3 | $105k | 12 | |
| 1991 | 0 | $0 | 12 | |
| 1990 | 1 | $99k | 12 | |
| 1989 | 2 | $187k | 12 | |
| 1988 | 1 | $88k | 12 | |
| 1987 | 2 | $158k | 12 | |
| 1986 | 1 | $72k | 12 | |
| 1985 | 2 | $132k | 12 | |
| 1984 | 5 | $260k | 12 | |
| 1983 | 1 | $45k | 12 | |
| 1982 | 2 | $94k | 12 | |
| 1981 | 8 | $185k | 12 | |
| 1980 | 1 | $45k | 12 |
By kind of building: buildings, units and value
| Year | Single-family: buildings / units / value | Two-unit: buildings / units / value | 3-4 units: buildings / units / value | 5 or more units: buildings / units / value |
|---|---|---|---|---|
| 2025 | 111 / 111 / $37.4M | 0 / 0 / $0 | 4 / 13 / $3.25M | 8 / 82 / $11.9M |
| 2024 | 113 / 113 / $39.5M | 1 / 2 / $329k | 2 / 8 / $2.00M | 7 / 121 / $17.6M |
| 2023 | 116 / 116 / $33.0M | 7 / 14 / $2.30M | 3 / 11 / $2.41M | 6 / 31 / $5.99M |
| 2022 | 67 / 67 / $21.2M | 30 / 60 / $14.0M | 10 / 39 / $7.56M | 5 / 119 / $11.8M |
| 2021 | 163 / 163 / $42.0M | 0 / 0 / $0 | 1 / 4 / $483k | 1 / 104 / $14.9M |
| 2020 | 146 / 146 / $37.6M | 0 / 0 / $0 | 11 / 44 / $5.31M | 2 / 90 / $12.9M |
| 2019 | 134 / 134 / $29.2M | 0 / 0 / $0 | 21 / 71 / $8.90M | 1 / 6 / $760k |
| 2018 | 151 / 151 / $32.0M | 34 / 68 / $11.0M | 1 / 4 / $600k | 6 / 36 / $860k |
| 2017 | 120 / 120 / $23.5M | 0 / 0 / $0 | 7 / 26 / $3.54M | 0 / 0 / $0 |
| 2016 | 36 / 36 / $8.80M | 31 / 62 / $9.17M | 10 / 37 / $4.74M | 4 / 40 / $3.24M |
| 2015 | 35 / 35 / $8.55M | 35 / 70 / $10.4M | 11 / 42 / $5.38M | 4 / 36 / $2.92M |
| 2014 | 19 / 19 / $5.44M | 0 / 0 / $0 | 3 / 12 / $1.57M | 5 / 60 / $4.28M |
| 2013 | 34 / 34 / $6.80M | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 2012 | 19 / 19 / $4.47M | 5 / 10 / $1.50M | 2 / 8 / $680k | 0 / 0 / $0 |
| 2011 | 23 / 23 / $4.88M | 1 / 2 / $314k | 1 / 4 / $320k | 4 / 48 / $3.40M |
| 2010 | 13 / 13 / $2.61M | 6 / 12 / $1.63M | 1 / 4 / $400k | 0 / 0 / $0 |
| 2009 | 16 / 16 / $2.85M | 4 / 8 / $840k | 3 / 12 / $1.04M | 0 / 0 / $0 |
| 2008 | 19 / 19 / $3.56M | 6 / 12 / $1.45M | 1 / 4 / $360k | 0 / 0 / $0 |
| 2007 | 34 / 34 / $6.01M | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 2006 | 24 / 24 / $3.80M | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 2005 | 40 / 40 / $4.44M | 0 / 0 / $0 | 0 / 0 / $0 | 1 / 5 / $300k |
| 2004 | 43 / 43 / $4.56M | 0 / 0 / $0 | 0 / 0 / $0 | 1 / 6 / $360k |
| 2003 | 24 / 24 / $2.88M | 1 / 2 / $120k | 0 / 0 / $0 | 0 / 0 / $0 |
| 2002 | 23 / 23 / $2.76M | 1 / 2 / $120k | 0 / 0 / $0 | 0 / 0 / $0 |
| 2001 | 23 / 23 / $2.88M | 0 / 0 / $0 | 0 / 0 / $0 | 5 / 67 / $3.91M |
| 2000 | 26 / 26 / $3.90M | 0 / 0 / $0 | 1 / 4 / $360k | 3 / 48 / $3.84M |
| 1999 | 30 / 30 / $3.75M | 0 / 0 / $0 | 1 / 3 / $158k | 4 / 46 / $2.99M |
| 1998 | 29 / 29 / $3.63M | 0 / 0 / $0 | 1 / 4 / $210k | 3 / 31 / $2.02M |
| 1997 | 16 / 16 / $1.92M | 2 / 4 / $280k | 6 / 24 / $1.92M | 2 / 19 / $1.43M |
| 1996 | 4 / 4 / $400k | 11 / 22 / $2.09M | 0 / 0 / $0 | 5 / 43 / $3.44M |
| 1995 | 16 / 16 / $1.66M | 0 / 0 / $0 | 1 / 4 / $320k | 1 / 9 / $630k |
| 1994 | 3 / 3 / $300k | 2 / 4 / $360k | 1 / 4 / $240k | 1 / 9 / $500k |
| 1993 | 1 / 1 / $90k | 1 / 2 / $160k | 0 / 0 / $0 | 0 / 0 / $0 |
| 1992 | 1 / 1 / $60k | 1 / 2 / $45k | 0 / 0 / $0 | 0 / 0 / $0 |
| 1991 | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1990 | 1 / 1 / $99k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1989 | 2 / 2 / $187k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1988 | 1 / 1 / $88k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1987 | 2 / 2 / $158k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1986 | 1 / 1 / $72k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1985 | 2 / 2 / $132k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1984 | 5 / 5 / $260k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1983 | 1 / 1 / $45k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1982 | 2 / 2 / $94k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
| 1981 | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 | 1 / 8 / $185k |
| 1980 | 1 / 1 / $45k | 0 / 0 / $0 | 0 / 0 / $0 | 0 / 0 / $0 |
Source: Building Permits Survey, annual place files (Midwest Region). Values are the construction cost on the permit, in that year's dollars. The archive's own permit records are on permits.tiffin.cc.
Land and density
On the Census Bureau's maps Tiffin covered 2.94 sq mi in 2000 and 4.42 sq mi on January 1, 2026. The boundary page has the map, every change and the annexations in the records.
| Census | Population | Land, sq mi | People per sq mi Derived |
|---|---|---|---|
| 2000 | 975 | 2.93 | 333 |
| 2010 | 1,947 | 4.13 | 471 |
| 2020 | 4,512 | 4.16 | 1,086 |
Land area: the Census Bureau's ALAND of the boundary in that census's TIGER/Line file.
Per-resident figures on the money pages
The budget and debt pages divide by these figures. An Iowa city's fiscal year runs from July 1 to June 30 and is named by the year it ends, so fiscal year N is divided by the population on July 1 of year N−1, the day it begins (the census count when that year is a census year, else the July 1 estimate). An amount on a date, such as the debt owed on June 30, uses that year's figure. A year the Census Bureau has not estimated yet uses the latest estimate, and the page says so. Tiffin's population more than tripled from 2010 to 2025, so a per-resident figure is only comparable with one computed for the same year.
About these figures
Sources, all from the U.S. Census Bureau unless named (public domain):
- Census 2000 Summary File 1, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2005-2009, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2006-2010, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- 2010 Census Summary File 1, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2007-2011, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2008-2012, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2009-2013, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2010-2014, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2011-2015, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2012-2016, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2013-2017, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2014-2018, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2015-2019, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2016-2020, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- 2020 Census Demographic and Housing Characteristics File, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- 2020 Census Redistricting Data (Public Law 94-171), U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2017-2021, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2018-2022, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2019-2023, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- American Community Survey 5-Year Data Profiles, 2020-2024, U.S. Census Bureau, Census Data API, retrieved November 11, 2026.
- Building Permits Survey, annual place files (Midwest Region), U.S. Census Bureau, retrieved November 11, 2026.
- Intercensal Estimates of the Resident Population for Incorporated Places, April 1, 2000 to July 1, 2010, U.S. Census Bureau, Population Estimates Program, retrieved November 11, 2026.
- Intercensal Estimates of the Resident Population for Incorporated Places, April 1, 2010 to July 1, 2020, U.S. Census Bureau, Population Estimates Program, retrieved November 11, 2026.
- Annual Estimates of the Resident Population for Incorporated Places in Iowa, April 1, 2020 to July 1, 2025 (Vintage 2025), U.S. Census Bureau, Population Estimates Program, retrieved November 11, 2026.
- Total Population for Iowa's Incorporated Places: 1850-2000, State Data Center of Iowa (State Library of Iowa), from the U.S. Census Bureau's decennial counts, retrieved November 11, 2026. Transcribed by hand from page 24 (row "Tiffin"); the table shows no count for Tiffin before 1910. Its 2000 figure (975) equals Census 2000 SF1 P001001.
The figures are the Census Bureau's as published; the archive adds only the changes, percentages and densities marked Derived. Census place 1978060 ("Tiffin city", Johnson County). Before 2000 the counts are the State Data Center of Iowa's table of the official counts, transcribed by hand. Retrieved November 11, 2026. Method: how the data is built.
Data last updated November 12, 2026. Built from the archive's documents; see how the data is built.