Delaware County, Ohio Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 13th-largest in Ohio
The population of Delaware County, Ohio is 221,160 as of the 2023 American Community Survey, making it the 13th-largest county in Ohio. The median household income is $130,088, the median home value is $419,500, and the median age is 39.9.
The population of Delaware County has grown 35.9% since 2010 (175,114 → 237,966), a +2.21% annualized rate.
221,160
Population
+2.21%
Annual growth
499
People / sq mi
$130,088
Median Income
$419,500
Median Home Value
Delaware County covers 443 sq mi of land at 499.1 people per square mile.
About Delaware County, OH
Among US counties, Delaware County stands out first on household income: a median of $130,088, above the US median of $78,538. With 221,160 residents, Delaware County is a county in Ohio. It ranks #13 among counties in Ohio by population.
Households here are among the highest-earning of all US counties: median income is $130,088, above the US median of $78,538. Very few residents live in poverty — 3.4%, below the national 12.4%. Housing is expensive: the median home is worth $419,500, with typical rent around $1,433.
The population is unusually well-credentialed for US counties — 58.0% of adults have a four-year degree, above the national 35.0%. An unusually large 23.7% of workers are remote, above the national 14.0%, and the average commute runs about 26 minutes each way.
Taken together, the income and housing figures place Delaware County firmly in the higher-cost, higher-earning tier of US counties — a profile that tends to track dense job markets and competitive housing.
Delaware County Population History (2010-2024)
The county of Delaware County had a population of 175,114 in 2010 and 237,966 in 2024, a 35.9% growth over 14 years. The peak was 237,966 in 2024. Average annual growth rate: 2.22%.
237,966
Population (2024)
175,114
Population (2010)
237,966
Peak (2024)
2.22%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 175,114 |
| 2011 | 178,584 |
| 2012 | 181,234 |
| 2013 | 185,545 |
| 2014 | 189,649 |
| 2015 | 193,624 |
| 2016 | 197,442 |
| 2017 | 201,157 |
| 2018 | 205,347 |
| 2019 | 209,768 |
| 2020 | 215,162 |
| 2021 | 221,304 |
| 2022 | 227,008 |
| 2023 | 232,732 |
| 2024 | 237,966 |
Race & Ethnicity
| White | 81.4% |
| Black or African American | 4.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.7% |
| Two or More Races | 0.0% |
Age & Sex
39.9
Median Age
50.0%
Female
50.0%
Male
14.7%
Age 65+
Age Distribution
Children (under 15): 20.4% · Seniors (65+): 14.7%
Income & Poverty
| Median household income | $130,088+$60,408 vs state |
| Mean household income | $161,060 |
| Per-capita income | $59,581 |
| Poverty rate | 3.4%-5.8% vs state |
| Unemployment rate | 2.1% |
| Employment-to-population | 68.1% |
Top Industries by Employment
The largest employment sector in Delaware County is professional & business services, accounting for 24.9% of workers.
How residents commute
0.2%
Drive alone
1.0%
Carpool
70.1%
Public transit
23.7%
Work from home
25.7 min
Avg commute
Housing
$419,500+$220,300 vs state
Median home value
$1,433
Median rent
78.2%
Homeownership rate
84,215
Total housing units
95.5%
Occupied
4.5%
Vacant
21.8%
Renter-occupied
Social & access
95.5%
With health insurance
97.9%
With broadband internet
23.0%
Foreign-born
6.0%
Veterans (18+)
8.2%
With a disability
89.6%
Speak language other than English at home
Education
97.1%
High School+
58.0%
Bachelor's+
Largest cities in Ohio
Other counties in Ohio
Part of Ohio
Metro areas in Ohio
County rankings
Frequently Asked Questions
Delaware County, Ohio has a population of 221,160 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 13th-largest county in Ohio. Population density is 499 people per square mile.
The population of Delaware County has grown 35.9% since 2010 (175,114 → 237,966), a +2.21% annualized rate.
The median household income in Delaware County, Ohio is $130,088, with mean (average) household income of $161,060 and per-capita income of $59,581. 3.4% of residents live below the federal poverty level.
In Delaware County, the largest racial and ethnic groups are White (81.4%), Black or African American (4.2%), Hispanic or Latino (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Delaware County, Ohio is 39.9 years. Residents are 50.0% female and 50.0% male.
The median home value in Delaware County is $419,500 and median monthly rent is $1,433. 78.2% of occupied housing units are owner-occupied. The county has 84,215 total housing units, 4.5% of which are vacant.
The largest employment sector in Delaware County, Ohio is professional, scientific, and management services, employing 24.9% of workers. The unemployment rate is 2.1%.
Columbus is among the largest cities associated with Delaware County, Ohio, with a population of 906,480.
Delaware County, OH Climate
Delaware County, OH has an average annual temperature of 10.3°C (51°F) and receives about 954 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10.3°C
Avg Temp
954
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -4° / 25° | 57 mm |
| February | -2° / 28° | 50 mm |
| March | 4° / 39° | 70 mm |
| April | 10° / 49° | 88 mm |
| May | 16° / 60° | 102 mm |
| June | 21° / 69° | 103 mm |
| July | 23° / 73° | 103 mm |
| August | 22° / 71° | 90 mm |
| September | 18° / 65° | 76 mm |
| October | 12° / 53° | 63 mm |
| November | 6° / 42° | 81 mm |
| December | 0° / 32° | 71 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Delaware County, OH
The most comfortable months to visit Delaware County, OH are typically August, June and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -8°C low). June is usually the wettest month.
Where to stay near Delaware County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.