City · Indiana
Delphi, Indiana
Delphi, city, in Carroll County, Indiana. Delphi had 2,973 residents on July 1, 2025 by the Census Bureau's estimate, up 1.0% since 2020; the 2020 Census counted 2,961 and the ACS 2020-2024 5-year estimates put it at 2,927 (±336). GEOID 1817614.
Residents, July 2025 estimate
2,973
Census Bureau estimate (no margin published)
2020 Census count: 2,961 · ACS 2020-2024: 2,927 ±336
Median household income
$59,972
±$19,667 (90% margin)
Indiana: $71,957
Median home value
$141,300
±$27,457 (90% margin)
Indiana: $218,200
Median gross rent
$933
±$209 (90% margin)
Indiana: $1,062
Where is Delphi and what county is it in?
Delphi is a city in Carroll County, Indiana. It covers 2.7 square miles of land, 1,091 residents per square mile in 2020.
Delphi is in the Lafayette-West Lafayette, IN metropolitan statistical area, which takes in 4 counties (Census Bureau delineation, July 2023).
Delphi lies entirely within Deer Creek Township (Carroll 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 Delphi, and is it growing?
The Census Bureau estimates that 2,973 people lived in Delphi on July 1, 2025, up 1.0% since 2020, slower than Indiana (+2.8%). The 2020 Census counted 2,961 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 2,927 (±336).
| Measure | Delphi | Carroll County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,927 ±336 | 20,535 | no clear change |
| Households | 1,067 ±167 | 8,085 | no clear change |
| Average household size | 2.65 ±0.40 | 2.53 | no clear change |
| Housing units | 1,263 ±198 | 9,559 | no clear change |
Delphi's population since 2000
From 3,015 in 2000 to 2,973 in 2025: down 1.4%. The 2000, 2010 and 2020 figures are census counts, each for Delphi 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 Delphi?
The median resident of Delphi is 37.0 years old; 28.3% are under 18 and 18.5% are 65 or older. The largest group is non-Hispanic white residents at 81.2%, then Hispanic or Latino residents (of any race) at 14.1%. 7.7% of residents were born outside the United States.
| Measure | Delphi | Carroll County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 37.0 ±6.5 | 43.2 | no clear change |
| Under 18 years | 28.3% ±6.6 pts | 21.8% | – |
| 65 years and over | 18.5% ±4.4 pts | 20.7% | – |
| Male | 45.0% ±4.8 pts | 51.2% | – |
| Hispanic or Latino (any race) | 14.1% ±5.4 pts | 4.6% | no clear change |
| White alone, not Hispanic | 81.2% ±6.1 pts | 92.5% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±1.3 pts | 0.3% | – |
| Asian alone, not Hispanic | 0.7% ±1.2 pts | 0.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.8% ±3.2 pts | 2.4% | – |
| Some other race alone, not Hispanic | 0.0% ±1.3 pts | 0.1% | – |
| Born outside the United States | 7.7% ±4.5 pts | 1.7% | no clear change |
| Speak a language other than English at home (age 5+) | 11.1% ±5.7 pts | 3.5% | – |
| Civilian veterans (age 18+) | 4.6% ±2.7 pts | 7.8% | – |
| With a disability | 16.3% ±6.2 pts | 12.3% | – |
| No health insurance coverage | 14.3% ±10.8 pts | 12.2% | – |
| High school graduate or higher (age 25+) | 88.4% ±5.5 pts | 89.6% | – |
| Bachelor's degree or higher (age 25+) | 13.2% ±5.2 pts | 17.2% | no clear change |
| Graduate or professional degree (age 25+) | 6.6% ±3.4 pts | 5.7% | – |
| Lived in the same house a year earlier | 79.4% ±6.8 pts | 90.5% | – |
| Moved from another state in the past year | 0.2% ±0.4 pts | 0.4% | – |
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 Delphi earn?
Half of Delphi's 1,067 households earn less than $59,972 a year (±$19,667), against $65,645 in Carroll County and $71,957 in Indiana. In 2015-2019 it was $52,818 in 2024 dollars; the margins of error cannot tell the two periods apart. 9.6% of residents live below the poverty line.
| Measure | Delphi | Carroll County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $59,972 ±$19,667 | $65,645 | no clear change |
| Mean household income | $78,117 ±$20,848 | $84,202 | – |
| Per capita income | $33,981 ±$7,899 | $35,594 | no clear change |
| People below the poverty line | 9.6% ±4.7 pts | 8.8% | no clear change |
| Children under 18 below the poverty line | 10.3% ±9.1 pts | 10.8% | – |
| Households receiving SNAP | 15.7% ±6.9 pts | 5.2% | – |
| Households with a computer | 98.1% ±1.8 pts | 93.4% | – |
| Households with a broadband subscription | 93.0% ±3.7 pts | 83.6% | – |
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 Delphi?
Owners occupy 66.1% of Delphi's occupied homes and renters 33.9%. The median owner-occupied home is valued at $141,300 by its owner (±$27,457). The median renter pays $933 a month including utilities, and 37.3% of renters pay 35% or more of their income on rent.
| Measure | Delphi | Carroll County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $141,300 ±$27,457 | $180,900 | +$39,645 |
| Median gross rent | $933 ±$209 | $890 | no clear change |
| Renters paying 35% or more of income on rent | 37.3% ±20.2 pts | 19.6% | no clear change |
| Median monthly owner costs, with a mortgage | $1,116 ±$79 | $1,190 | – |
| Owner-occupied homes | 66.1% ±10.0 pts | 82.2% | no clear change |
| Renter-occupied homes | 33.9% ±10.0 pts | 17.8% | – |
| Housing units | 1,263 ±198 | 9,559 | no clear change |
| Homeowner vacancy rate | 0.0% ±5.2 pts | 0.1% | – |
| Rental vacancy rate | 17.7% ±15.9 pts | 13.2% | – |
| Single-family detached homes | 60.8% ±9.8 pts | 84.5% | – |
| Mobile homes | 7.2% ±6.1 pts | 6.8% | – |
| Built 2020 or later | 0.0% ±2.9 pts | 1.2% | – |
| Built 2010 to 2019 | 1.8% ±2.0 pts | 5.5% | – |
| Built 1939 or earlier | 31.7% ±9.3 pts | 30.7% | – |
| Households with no vehicle | 9.8% ±5.5 pts | 4.6% | – |
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 many new homes is Delphi building?
Builders took permits for 0 new housing units in Delphi in 2025 (0 in single-family houses), 0.0 per 1,000 residents against 4.2 across Indiana.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Delphi work and get to work?
77.4% of Delphi's workers drive alone. The average trip to work takes 23.7 minutes. The unemployment rate in 2020-2024 averaged 4.9%.
| Measure | Delphi | Carroll County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 57.6% ±7.3 pts | 63.6% | – |
| Unemployment rate | 4.9% ±3.2 pts | 3.1% | – |
| Drove alone to work | 77.4% ±8.9 pts | 83.0% | – |
| Carpooled | 18.0% ±8.5 pts | 8.4% | – |
| Public transportation | 0.0% ±3.2 pts | 0.3% | – |
| Walked | 0.0% ±3.2 pts | 0.8% | – |
| Worked from home | 4.6% ±3.8 pts | 6.2% | – |
| Mean travel time to work | 23.7 min ±4.2 | 25.2 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 Delphi?
1 census tract lies mostly in Delphi, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9596Carroll County | 3,217 | $62,209 |
| Tract 9597Carroll County | 3,317 | $71,997 |
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 Delphi) · Census block assignment files
How does Delphi compare with other places in Indiana?
By the Census Bureau's July 2025 estimates, Delphi is the 6,370th-most populous of the 19,476 U.S. incorporated places that have one and the 161st-most populous of 566 in Indiana.
Delphi ranks 798th of 1,072 places in Indiana with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 161st | 566 |
| Growth 2020-2025 (PEP) | 575th | 1,056 |
| Residents per square mile | 296th | 1,088 |
| Median household income | 798th | 1,072 |
| Per capita income | 610th | 1,087 |
| Median home value | 847th | 1,075 |
| Median gross rent | 411th | 904 |
| Poverty rate | 456th | 736 |
| Bachelor's degree or higher | 859th | 1,029 |
| Median age | 789th | 1,083 |
| Owner-occupied share | 914th | 1,087 |
| Travel time to work | 684th | 1,088 |
Delphi's figures with every place in Indiana (CSV)
Every place in Indiana, sortable · Compare Delphi 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 Delphi?
17 of the 57 figures for Delphi 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 Delphi 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 Delphi.