Town · Indiana
Oldenburg, Indiana
Oldenburg, town, in Franklin County, Indiana. Oldenburg had 651 residents on July 1, 2025 by the Census Bureau's estimate, up 1.1% since 2020; the 2020 Census counted 647 and the ACS 2020-2024 5-year estimates put it at 770 (±205). GEOID 1856286.
Residents, July 2025 estimate
651
Census Bureau estimate (no margin published)
2020 Census count: 647 · ACS 2020-2024: 770 ±205
Median household income
$79,583
±$22,467 (90% margin)
Indiana: $71,957
Median home value
$276,100
±$62,160 (90% margin)
Indiana: $218,200
Median gross rent
$681
±$261 (90% margin)
Indiana: $1,062
Where is Oldenburg and what county is it in?
Oldenburg is a town in Franklin County, Indiana. It covers 0.4 square miles of land, 1,505 residents per square mile in 2020.
Oldenburg is in the Cincinnati, OH-KY-IN metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Oldenburg lies entirely within Ray Township (Franklin County), a township with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Oldenburg, and is it growing?
The Census Bureau estimates that 651 people lived in Oldenburg on July 1, 2025, up 1.1% since 2020, slower than Indiana (+2.8%). The 2020 Census counted 647 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 770 (±205).
| Measure | Oldenburg | Franklin County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 770 ±205 | 23,020 | +312 |
| Households | 219 ±59 | 9,211 | no clear change |
| Average household size | 2.88 ±0.66 | 2.48 | +0.89 |
| Housing units | 231 ±66 | 9,796 | no clear change |
Oldenburg's population since 2000
From 647 in 2000 to 651 in 2025: up 0.6%. The 2000, 2010 and 2020 figures are census counts, each for Oldenburg as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Oldenburg?
The median resident of Oldenburg is 39.8 years old; 28.1% are under 18 and 31.8% are 65 or older. The largest group is non-Hispanic white residents at 98.4%, then non-Hispanic residents of two or more races at 1.6%.
| Measure | Oldenburg | Franklin County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 39.8 ±11.9 | 42.4 | −21.4 |
| Under 18 years | 28.1% ±8.5 pts | 22.0% | – |
| 65 years and over | 31.8% ±9.0 pts | 20.3% | – |
| Male | 41.4% ±6.7 pts | 49.9% | – |
| Hispanic or Latino (any race) | 0.0% ±4.7 pts | 1.2% | – |
| White alone, not Hispanic | 98.4% ±1.7 pts | 95.7% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±4.7 pts | 0.1% | – |
| Asian alone, not Hispanic | 0.0% ±4.7 pts | 0.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±4.7 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±4.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.6% ±1.7 pts | 1.8% | – |
| Some other race alone, not Hispanic | 0.0% ±4.7 pts | 0.4% | – |
| Born outside the United States | 0.0% ±4.7 pts | 1.3% | – |
| Speak a language other than English at home (age 5+) | 0.0% ±5.0 pts | 2.8% | – |
| Civilian veterans (age 18+) | 2.3% ±2.0 pts | 9.0% | – |
| With a disability | 21.6% ±6.4 pts | 13.3% | – |
| No health insurance coverage | 2.9% ±2.5 pts | 6.7% | – |
| High school graduate or higher (age 25+) | 96.0% ±2.7 pts | 90.2% | – |
| Bachelor's degree or higher (age 25+) | 51.8% ±11.1 pts | 19.5% | no clear change |
| Graduate or professional degree (age 25+) | 28.6% ±11.6 pts | 5.5% | – |
| Lived in the same house a year earlier | 96.7% ±2.8 pts | 91.7% | – |
| Moved from another state in the past year | 0.9% ±1.2 pts | 1.1% | – |
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 Oldenburg earn?
Half of Oldenburg's 219 households earn less than $79,583 a year (±$22,467), against $78,074 in Franklin County and $71,957 in Indiana. In 2015-2019 it was $68,457 in 2024 dollars; the margins of error cannot tell the two periods apart. 18.6% of residents live below the poverty line.
| Measure | Oldenburg | Franklin County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $79,583 ±$22,467 | $78,074 | no clear change |
| Mean household income | $111,891 ±$46,864 | $97,859 | – |
| Per capita income | $39,185 ±$12,970 | $40,060 | no clear change |
| People below the poverty line | 18.6% ±6.9 pts | 6.9% | – |
| Children under 18 below the poverty line | 1.9% ±3.5 pts | 6.0% | – |
| Households receiving SNAP | 2.7% ±4.5 pts | 4.6% | – |
| Households with a computer | 91.3% ±5.9 pts | 90.8% | – |
| Households with a broadband subscription | 84.0% ±6.5 pts | 83.0% | – |
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 Oldenburg?
Owners occupy 70.8% of Oldenburg's occupied homes and renters 29.2%. The median owner-occupied home is valued at $276,100 by its owner (±$62,160). The median renter pays $681 a month including utilities, and 40.7% of renters pay 35% or more of their income on rent.
| Measure | Oldenburg | Franklin County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $276,100 ±$62,160 | $249,500 | no clear change |
| Median gross rent | $681 ±$261 | $870 | no clear change |
| Renters paying 35% or more of income on rent | 40.7% ±22.2 pts | 33.9% | – |
| Median monthly owner costs, with a mortgage | $1,585 ±$316 | $1,548 | – |
| Owner-occupied homes | 70.8% ±11.3 pts | 81.5% | no clear change |
| Renter-occupied homes | 29.2% ±11.3 pts | 18.5% | – |
| Housing units | 231 ±66 | 9,796 | no clear change |
| Homeowner vacancy rate | 0.0% ±21.3 pts | 0.3% | – |
| Rental vacancy rate | 0.0% ±39.8 pts | 1.4% | – |
| Single-family detached homes | 78.8% ±9.6 pts | 80.5% | – |
| Mobile homes | 0.4% ±1.0 pts | 12.0% | – |
| Built 2020 or later | 0.0% ±14.9 pts | 1.5% | – |
| Built 2010 to 2019 | 10.8% ±14.9 pts | 7.3% | – |
| Built 1939 or earlier | 32.0% ±10.2 pts | 14.6% | – |
| Households with no vehicle | 9.1% ±7.5 pts | 6.5% | – |
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 Oldenburg work and get to work?
80.5% of Oldenburg's workers drive alone. The average trip to work takes 21.9 minutes.
| Measure | Oldenburg | Franklin County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.5% ±12.1 pts | 62.1% | – |
| Unemployment rate | 0.9% ±1.3 pts | 3.9% | – |
| Drove alone to work | 80.5% ±17.9 pts | 78.0% | – |
| Carpooled | 1.5% ±1.9 pts | 9.3% | – |
| Public transportation | 0.0% ±10.8 pts | 0.0% | – |
| Walked | 3.7% ±3.7 pts | 2.0% | – |
| Worked from home | 13.7% ±17.0 pts | 9.3% | – |
| Mean travel time to work | 21.9 min ±7.1 | 36.0 min | no clear change |
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 census tracts are in Oldenburg?
No census tract lies mostly in Oldenburg; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9601Franklin County | 5,266 | $85,804 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Oldenburg) · Census block assignment files
How does Oldenburg compare with other places in Indiana?
By the Census Bureau's July 2025 estimates, Oldenburg is the 12,135th-most populous of the 19,476 U.S. incorporated places that have one and the 376th-most populous of 566 in Indiana.
Oldenburg is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 376th | 566 |
Oldenburg's figures with every place in Indiana (CSV)
Every place in Indiana, sortable · Compare Oldenburg with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Oldenburg?
25 of the 57 figures for Oldenburg 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Oldenburg are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Oldenburg.