Census tract · Marion County
Census Tract 305, Marion County, Iowa
Census Tract 305, GEOID 19125030500, in Marion County, Iowa, entirely within Knoxville. 2,089 residents in the ACS 2020-2024 5-year estimates (±278); the 2020 Census counted 2,000.
Residents, 2020-2024
2,089
±278 (90% margin)
2020 Census count: 2,000
Median household income
$60,101
±$4,372 (90% margin)
Marion County: $78,680
Median home value
$132,800
±$18,253 (90% margin)
Marion County: $233,000
Median gross rent
$750
±$149 (90% margin)
Marion County: $884
Where is Census Tract 305?
Census Tract 305 is one of 10 census tracts in Marion County, Iowa. It covers 0.55 square miles of land, 3,670 residents per square mile in 2020. Its GEOID, 19125030500, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Knoxville | 100% |
2 census tracts border Census Tract 305: Tract 304.01 ($80,076) and Tract 304.02 ($93,938). 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 305?
The 2020-2024 American Community Survey puts Census Tract 305's population at 2,089 (±278) in 981 households; the 2020 Census counted 2,000 residents and 952 housing units.
| Measure | Tract 305 | Knoxville |
|---|---|---|
| Total population | 2,089 ±278 | 7,473 |
| Households | 981 ±137 | 3,173 |
| Average household size | 2.10 ±0.19 | 2.29 |
| Housing units | 1,066 ±128 | 3,478 |
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 305?
The median resident of Census Tract 305 is 30.2 years old; 22.0% are under 18 and 16.0% are 65 or older. The largest group is non-Hispanic white residents at 88.3%, then non-Hispanic Asian residents at 4.7%.
| Measure | Tract 305 | Knoxville |
|---|---|---|
| Median age | 30.2 ±7.2 | 42.2 |
| Under 18 years | 22.0% ±4.2 pts | 19.5% |
| 65 years and over | 16.0% ±5.0 pts | 23.0% |
| Hispanic or Latino (any race) | 1.3% ±2.0 pts | 1.9% |
| White alone, not Hispanic | 88.3% ±5.8 pts | 93.0% |
| Black or African American alone, not Hispanic | 0.8% ±1.0 pts | 0.3% |
| Asian alone, not Hispanic | 4.7% ±3.9 pts | 1.5% |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.2 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.2 pts | 0.0% |
| Two or more races, not Hispanic | 3.7% ±2.7 pts | 3.0% |
| Some other race alone, not Hispanic | 1.1% ±1.5 pts | 0.3% |
| Born outside the United States | 4.3% ±3.8 pts | 1.4% |
| Speak a language other than English at home (age 5+) | 0.8% ±1.4 pts | 2.9% |
| Civilian veterans (age 18+) | 5.2% ±2.8 pts | 5.1% |
| With a disability | 24.2% ±5.5 pts | 19.0% |
| No health insurance coverage | 2.7% ±2.0 pts | 3.6% |
| High school graduate or higher (age 25+) | 90.7% ±3.9 pts | 93.9% |
| Bachelor's degree or higher (age 25+) | 15.6% ±5.0 pts | 30.6% |
| Graduate or professional degree (age 25+) | 2.9% ±2.8 pts | 8.5% |
| Lived in the same house a year earlier | 75.2% ±10.3 pts | 83.4% |
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 305 earn?
Half of the 981 households in Census Tract 305 earn less than $60,101 a year (±$4,372), against $78,680 across Marion County: 10th highest of the county's 10 tracts with a reliable estimate. 12.5% of residents live below the poverty line.
| Measure | Tract 305 | Knoxville |
|---|---|---|
| Median household income | $60,101 ±$4,372 | $61,599 |
| Mean household income | $78,842 ±$20,359 | $84,447 |
| Per capita income | $36,250 ±$10,251 | $36,768 |
| People below the poverty line | 12.5% ±5.0 pts | 12.5% |
| Children under 18 below the poverty line | 13.9% ±10.1 pts | 15.4% |
| Households receiving SNAP | 24.6% ±9.0 pts | 13.6% |
| Households with a computer | 88.9% ±5.7 pts | 89.5% |
| Households with a broadband subscription | 84.5% ±7.2 pts | 81.7% |
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 305?
Owners occupy 66.6% of Census Tract 305's occupied homes and renters 33.4%. The median owner-occupied home is valued at $132,800 by its owner (±$18,253). The median renter pays $750 a month including utilities, and 15.7% of renters pay 35% or more of their income on rent.
| Measure | Tract 305 | Knoxville |
|---|---|---|
| Median home value (owner-occupied) | $132,800 ±$18,253 | $160,300 |
| Median gross rent | $750 ±$149 | $801 |
| Renters paying 35% or more of income on rent | 15.7% ±9.5 pts | 24.9% |
| Median monthly owner costs, with a mortgage | $1,148 ±$65 | $1,217 |
| Owner-occupied homes | 66.6% ±9.7 pts | 76.0% |
| Renter-occupied homes | 33.4% ±9.7 pts | 24.0% |
| Housing units | 1,066 ±128 | 3,478 |
| Single-family detached homes | 74.4% ±8.5 pts | 71.1% |
| Mobile homes | 0.9% ±1.8 pts | 7.8% |
| Built 2020 or later | 0.0% ±2.3 pts | 0.0% |
| Built 2010 to 2019 | 3.8% ±4.6 pts | 5.9% |
| Built 1939 or earlier | 44.6% ±10.8 pts | 21.3% |
| Households with no vehicle | 4.6% ±3.2 pts | 4.3% |
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 305 get to work?
87.2% of Census Tract 305's workers drive alone. The average trip to work takes 21.8 minutes.
| Measure | Tract 305 | Knoxville |
|---|---|---|
| In the labor force (age 16+) | 59.2% ±6.4 pts | 64.2% |
| Unemployment rate | 4.2% ±2.9 pts | 4.8% |
| Drove alone to work | 87.2% ±5.5 pts | 78.5% |
| Carpooled | 6.2% ±4.1 pts | 7.9% |
| Public transportation | 0.0% ±2.6 pts | 0.0% |
| Walked | 1.5% ±2.8 pts | 1.1% |
| Worked from home | 1.1% ±1.7 pts | 10.7% |
| Mean travel time to work | 21.8 min ±5.6 | 23.0 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 305 compare with the other tracts in Marion County?
Among Marion County's tracts with a reliable estimate, Census Tract 305 ranks as shown below (1 = highest).
| Measure | In Marion County | In Knoxville |
|---|---|---|
| Population | 10th of 10 | 3rd of 3 |
| Residents per square mile | 1st of 10 | 1st of 3 |
| Median household income | 10th of 10 | 3rd of 3 |
| Per capita income | 6th of 10 | 2nd of 3 |
| Median home value | 10th of 10 | 3rd of 3 |
| Median gross rent | 9th of 10 | 3rd of 3 |
| Poverty rate | 2nd of 10 | 2nd of 3 |
| Bachelor's degree or higher | 9th of 10 | 3rd of 3 |
| Median age | 9th of 10 | 3rd of 3 |
| Owner-occupied share | 8th of 10 | 3rd of 3 |
The tracts next to it on Marion County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 301.02 | 7th | $70,103±$4,078 |
| Tract 303 | 8th | $68,692±$7,764 · within the margin of this tract |
| Tract 307 | 9th | $66,111±$11,813 · within the margin of this tract |
| Tract 305 | 10th | $60,101±$4,372 |
"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 305?
4 of the 18 figures for Census Tract 305 on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
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