Census tract · Johnson County
Census Tract 1, Johnson County, Iowa
Census Tract 1, GEOID 19103000100, in Johnson County, Iowa, mostly within Iowa City (79% of its census blocks). 6,929 residents in the ACS 2020-2024 5-year estimates (±737); the 2020 Census counted 7,035.
Residents, 2020-2024
6,929
±737 (90% margin)
2020 Census count: 7,035
Median household income
$95,377
±$13,995 (90% margin)
Johnson County: $74,935
Median home value
$368,500
±$40,173 (90% margin)
Johnson County: $308,600
Median gross rent
$1,656
±$266 (90% margin)
Johnson County: $1,122
Where is Census Tract 1?
Census Tract 1 is one of 36 census tracts in Johnson County, Iowa. It covers 7.55 square miles of land, 932 residents per square mile in 2020. Its GEOID, 19103000100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Iowa City | 79% |
10 census tracts border Census Tract 1: Tract 2 ($45,724), Tract 3.06 ($120,536), Tract 11 ($30,271), Tract 12 ($77,557), Tract 13 ($109,115), Tract 21 ($21,543), Tract 23 ($69,118), Tract 101 ($134,571), Tract 103.08 ($148,009) and Tract 105.01 ($84,267). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 1?
The 2020-2024 American Community Survey puts Census Tract 1's population at 6,929 (±737) in 2,856 households; the 2020 Census counted 7,035 residents and 3,105 housing units.
| Measure | Tract 1 | Iowa City |
|---|---|---|
| Total population | 6,929 ±737 | 75,752 |
| Households | 2,856 ±277 | 30,816 |
| Average household size | 2.15 ±0.11 | 2.24 |
| Housing units | 3,011 ±303 | 33,863 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 1?
The median resident of Census Tract 1 is 31.8 years old; 12.3% are under 18 and 20.5% are 65 or older. The largest group is non-Hispanic white residents at 79.5%, then non-Hispanic Black residents at 6.3%. 11.7% of residents were born outside the United States.
| Measure | Tract 1 | Iowa City |
|---|---|---|
| Median age | 31.8 ±6.9 | 26.2 |
| Under 18 years | 12.3% ±2.8 pts | 14.3% |
| 65 years and over | 20.5% ±3.7 pts | 12.3% |
| Hispanic or Latino (any race) | 4.8% ±2.5 pts | 8.1% |
| White alone, not Hispanic | 79.5% ±5.8 pts | 70.4% |
| Black or African American alone, not Hispanic | 6.3% ±4.1 pts | 9.4% |
| Asian alone, not Hispanic | 5.3% ±2.6 pts | 7.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.4 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.4 pts | 0.0% |
| Two or more races, not Hispanic | 1.1% ±0.9 pts | 4.3% |
| Some other race alone, not Hispanic | 2.9% ±3.2 pts | 0.7% |
| Born outside the United States | 11.7% ±5.7 pts | 12.2% |
| Speak a language other than English at home (age 5+) | 12.2% ±5.5 pts | 18.2% |
| Civilian veterans (age 18+) | 5.5% ±2.9 pts | 3.4% |
| With a disability | 9.0% ±2.6 pts | 11.0% |
| No health insurance coverage | 2.6% ±2.7 pts | 4.5% |
| High school graduate or higher (age 25+) | 99.7% ±0.5 pts | 96.5% |
| Bachelor's degree or higher (age 25+) | 78.3% ±4.8 pts | 60.5% |
| Graduate or professional degree (age 25+) | 41.8% ±7.4 pts | 29.8% |
| Lived in the same house a year earlier | 71.8% ±6.3 pts | 68.7% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 1 earn?
Half of the 2,856 households in Census Tract 1 earn less than $95,377 a year (±$13,995), against $74,935 across Johnson County: 13th highest of the county's 36 tracts with a reliable estimate. 14.6% of residents live below the poverty line.
| Measure | Tract 1 | Iowa City |
|---|---|---|
| Median household income | $95,377 ±$13,995 | $58,546 |
| Mean household income | $132,837 ±$25,060 | $90,456 |
| Per capita income | $56,733 ±$10,299 | $37,842 |
| People below the poverty line | 14.6% ±5.6 pts | 26.3% |
| Children under 18 below the poverty line | 23.5% ±25.1 pts | 14.2% |
| Households receiving SNAP | 3.3% ±2.7 pts | 7.0% |
| Households with a computer | 99.1% ±1.0 pts | 97.5% |
| Households with a broadband subscription | 92.8% ±4.2 pts | 86.1% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 1?
Owners occupy 60.9% of Census Tract 1's occupied homes and renters 39.1%. The median owner-occupied home is valued at $368,500 by its owner (±$40,173). The median renter pays $1,656 a month including utilities, and 33.4% of renters pay 35% or more of their income on rent.
| Measure | Tract 1 | Iowa City |
|---|---|---|
| Median home value (owner-occupied) | $368,500 ±$40,173 | $285,900 |
| Median gross rent | $1,656 ±$266 | $1,094 |
| Renters paying 35% or more of income on rent | 33.4% ±15.5 pts | 52.1% |
| Median monthly owner costs, with a mortgage | $1,983 ±$411 | $1,813 |
| Owner-occupied homes | 60.9% ±9.1 pts | 47.2% |
| Renter-occupied homes | 39.1% ±9.1 pts | 52.8% |
| Housing units | 3,011 ±303 | 33,863 |
| Single-family detached homes | 58.4% ±6.7 pts | 39.8% |
| Mobile homes | 0.0% ±0.8 pts | 2.1% |
| Built 2020 or later | 5.5% ±3.5 pts | 2.1% |
| Built 2010 to 2019 | 20.3% ±6.1 pts | 16.4% |
| Built 1939 or earlier | 11.9% ±4.1 pts | 11.8% |
| Households with no vehicle | 4.5% ±3.4 pts | 11.0% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 1 get to work?
55.0% of Census Tract 1's workers drive alone and 20.4% work from home. The average trip to work takes 17.7 minutes. The unemployment rate in 2020-2024 averaged 4.7%.
| Measure | Tract 1 | Iowa City |
|---|---|---|
| In the labor force (age 16+) | 66.4% ±3.6 pts | 68.4% |
| Unemployment rate | 4.7% ±2.2 pts | 4.6% |
| Drove alone to work | 55.0% ±9.4 pts | 56.2% |
| Carpooled | 5.5% ±3.4 pts | 6.7% |
| Public transportation | 8.0% ±4.9 pts | 6.0% |
| Walked | 6.9% ±3.2 pts | 14.6% |
| Worked from home | 20.4% ±5.8 pts | 12.2% |
| Mean travel time to work | 17.7 min ±3.5 | 17.3 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 1 compare with the other tracts in Johnson County?
Among Johnson County's tracts with a reliable estimate, Census Tract 1 ranks as shown below (1 = highest).
| Measure | In Johnson County | In Iowa City |
|---|---|---|
| Population | 4th of 36 | 1st of 19 |
| Residents per square mile | 25th of 36 | 17th of 19 |
| Median household income | 13th of 36 | 3rd of 19 |
| Per capita income | 8th of 36 | 2nd of 19 |
| Median home value | 11th of 35 | 4th of 18 |
| Median gross rent | 1st of 36 | 1st of 19 |
| Poverty rate | 17th of 28 | 13th of 18 |
| Bachelor's degree or higher | 4th of 36 | 3rd of 19 |
| Median age | 22nd of 36 | 10th of 19 |
| Owner-occupied share | 20th of 34 | 9th of 17 |
The tracts next to it on Johnson County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 103.07 | 10th | $102,969±$23,759 · within the margin of this tract |
| Tract 103.05 | 11th | $100,814±$3,737 · within the margin of this tract |
| Tract 103.03 | 12th | $99,646±$18,134 · within the margin of this tract |
| Tract 1 | 13th | $95,377±$13,995 |
| Tract 105.01 | 14th | $84,267±$9,626 · within the margin of this tract |
| Tract 105.02 | 15th | $83,194±$12,659 · within the margin of this tract |
| Tract 14 | 16th | $80,897±$14,234 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 1?
Every figure for Census Tract 1 on this page has a coefficient of variation under 40%, the Census Bureau's threshold for a usable estimate.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections