Census tract · Marion County
Census Tract 3521, Marion County, Indiana
Census Tract 3521, GEOID 18097352100, in Marion County, Indiana, entirely within Indianapolis and Center Township, Marion County. 2,107 residents in the ACS 2020-2024 5-year estimates (±515); the 2020 Census counted 2,121.
Residents, 2020-2024
2,107
±515 (90% margin)
2020 Census count: 2,121
Median household income
$46,537
±$19,337 (90% margin)
Marion County: $66,346
Median home value
$91,300
±$42,090 (90% margin)
Marion County: $224,000
Median gross rent
$1,095
±$136 (90% margin)
Marion County: $1,153
Where is Census Tract 3521?
Census Tract 3521 is one of 253 census tracts in Marion County, Indiana. It covers 0.60 square miles of land, 3,512 residents per square mile in 2020. Its GEOID, 18097352100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Indianapolis | 100% |
| Center Township, Marion County | 100% |
5 census tracts border Census Tract 3521: Tract 3507, Tract 3519 ($51,031), Tract 3523 ($39,583), Tract 3526 ($72,264) and Tract 3528 ($48,500). 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 3521?
The 2020-2024 American Community Survey puts Census Tract 3521's population at 2,107 (±515) in 717 households; the 2020 Census counted 2,121 residents and 992 housing units.
| Measure | Tract 3521 | Indianapolis |
|---|---|---|
| Total population | 2,107±515 | 885,860 |
| Households | 717±157 | 362,961 |
| Average household size | 2.89±0.49 | 2.40 |
| Housing units | 1,054±142 | 401,428 |
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 3521?
The median resident of Census Tract 3521 is 29.0 years old; 33.1% are under 18 and 7.8% are 65 or older. The largest group is non-Hispanic Black residents at 68.7%, then Hispanic or Latino residents (of any race) at 16.5%.
| Measure | Tract 3521 | Indianapolis |
|---|---|---|
| Median age | 29.0±5.7 | 34.3 |
| Under 18 years | 33.1%±7.7 pts | 24.8% |
| 65 years and over | 7.8%±3.7 pts | 13.1% |
| Hispanic or Latino (any race) | 16.5%±9.2 pts | 13.8% |
| White alone, not Hispanic | 11.4%±6.1 pts | 48.9% |
| Black or African American alone, not Hispanic | 68.7%±9.0 pts | 27.6% |
| Asian alone, not Hispanic | 0.2%±0.7 pts | 4.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.8 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.8 pts | 0.0% |
| Two or more races, not Hispanic | 3.1%±2.6 pts | 4.9% |
| Some other race alone, not Hispanic | 0.0%±1.8 pts | 0.6% |
| Born outside the United States | 5.3%±3.9 pts | 12.7% |
| Speak a language other than English at home (age 5+) | 15.2%±7.7 pts | 18.3% |
| Civilian veterans (age 18+) | 2.5%±2.5 pts | 5.4% |
| With a disability | 28.1%±9.8 pts | 13.9% |
| No health insurance coverage | 8.1%±4.5 pts | 8.8% |
| High school graduate or higher (age 25+) | 84.5%±8.0 pts | 87.9% |
| Bachelor's degree or higher (age 25+) | 8.2%±5.9 pts | 34.9% |
| Graduate or professional degree (age 25+) | 4.9%±5.3 pts | 12.8% |
| Lived in the same house a year earlier | 92.4%±4.6 pts | 85.4% |
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 3521 earn?
Half of the 717 households in Census Tract 3521 earn less than $46,537 a year (±$19,337), against $66,346 across Marion County: 198th highest of the county's 246 tracts with a reliable estimate. 32.7% of residents live below the poverty line.
| Measure | Tract 3521 | Indianapolis |
|---|---|---|
| Median household income | $46,537±$19,337 | $66,219 |
| Mean household income | $55,989±$7,904 | $90,667 |
| Per capita income | $20,778±$5,034 | $37,680 |
| People below the poverty line | 32.7%±16.4 pts | 15.8% |
| Children under 18 below the poverty line | 58.6%±30.4 pts | 22.4% |
| Households receiving SNAP | 35.3%±10.7 pts | 12.6% |
| Households with a computer | 97.1%±4.0 pts | 95.9% |
| Households with a broadband subscription | 84.9%±7.5 pts | 91.8% |
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 3521?
Owners occupy 52.7% of Census Tract 3521's occupied homes and renters 47.3%. The median owner-occupied home is valued at $91,300 by its owner (±$42,090). The median renter pays $1,095 a month including utilities, and 55.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 3521 | Indianapolis |
|---|---|---|
| Median home value (owner-occupied) | $91,300±$42,090 | $224,800 |
| Median gross rent | $1,095±$136 | $1,156 |
| Renters paying 35% or more of income on rent | 55.3%±24.9 pts | 41.7% |
| Median monthly owner costs, with a mortgage | $1,243±$643 | $1,462 |
| Owner-occupied homes | 52.7%±15.3 pts | 56.0% |
| Renter-occupied homes | 47.3%±15.3 pts | 44.0% |
| Housing units | 1,054±142 | 401,428 |
| Single-family detached homes | 94.5%±4.2 pts | 59.0% |
| Mobile homes | 0.0%±3.5 pts | 1.2% |
| Built 2020 or later | 0.0%±3.5 pts | 1.1% |
| Built 2010 to 2019 | 2.8%±3.3 pts | 6.7% |
| Built 1939 or earlier | 38.2%±11.6 pts | 15.7% |
| Households with no vehicle | 13.0%±14.7 pts | 8.4% |
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 3521 get to work?
62.6% of Census Tract 3521's workers drive alone. The average trip to work takes 40.1 minutes.
| Measure | Tract 3521 | Indianapolis |
|---|---|---|
| In the labor force (age 16+) | 60.0%±9.5 pts | 68.6% |
| Unemployment rate | 9.8%±7.4 pts | 5.1% |
| Drove alone to work | 62.6%±22.1 pts | 71.8% |
| Carpooled | 20.6%±15.9 pts | 9.6% |
| Public transportation | 14.7%±18.0 pts | 1.4% |
| Walked | 1.5%±2.0 pts | 1.8% |
| Worked from home | 0.0%±5.1 pts | 14.0% |
| Mean travel time to work | 40.1 min±22.3 | 24.6 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 3521 compare with the other tracts in Marion County?
Among Marion County's tracts with a reliable estimate, Census Tract 3521 ranks as shown below (1 = highest).
| Measure | In Marion County | In Indianapolis |
|---|---|---|
| Population | 213th of 252 | 194th of 231 |
| Residents per square mile | 112th of 253 | 103rd of 232 |
| Median household income | 198th of 246 | 181st of 226 |
| Per capita income | 223rd of 250 | 203rd of 229 |
| Median home value | 238th of 247 | 218th of 226 |
| Median gross rent | 154th of 237 | 139th of 217 |
| Poverty rate | 30th of 172 | 30th of 161 |
| Median age | 222nd of 251 | 201st of 230 |
| Owner-occupied share | 141st of 249 | 128th of 228 |
The tracts next to it on Marion County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 3425 | 195th | $47,964±$15,558 · within the margin of this tract |
| Tract 3419.03 | 196th | $47,619±$25,676 · within the margin of this tract |
| Tract 3417.01 | 197th | $47,083±$25,499 · within the margin of this tract |
| Tract 3521 | 198th | $46,537±$19,337 |
| Tract 3803.02 | 199th | $46,526±$6,780 · within the margin of this tract |
| Tract 3573 | 200th | $46,328±$20,371 · within the margin of this tract |
| Tract 3103.09 | 201st | $46,083±$18,193 · 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 3521?
3 of the 18 figures for Census Tract 3521 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