Delaware County Population

1900–2026

42,171

2026 projection

4.4% since 2020 (increase)

010K20K30K40K50K1900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Delaware County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202642,171+2610.62%
202541,910+2610.63%
202441,649-530.13%
202341,702+2280.55%
202241,474+5171.26%
202140,957+5761.43%
202040,381-2,6306.11%
201943,011+1140.27%
201842,897+2050.48%
201742,692+7251.73%

Showing 10 of 27 years.

Delaware County Demographics

46.9median age

Median age

Female48 yrs
Male46.1 yrs

Adults

33,109
10,601 seniors (65+) · 32% of adults22,508 other adults

Sex

Female 50.6% · 20,879Male 49.4% · 20,400

Population by age

MaleFemale85+ years, male: 27685+ years, female: 37580–84 years, male: 70980–84 years, female: 78975–79 years, male: 1,19275–79 years, female: 1,14970–74 years, male: 1,43570–74 years, female: 1,52865–69 years, male: 1,48665–69 years, female: 1,66260–64 years, male: 1,71660–64 years, female: 1,85455–59 years, male: 1,30455–59 years, female: 1,33750–54 years, male: 1,27450–54 years, female: 1,31345–49 years, male: 1,11145–49 years, female: 1,15940–44 years, male: 1,10840–44 years, female: 1,16235–39 years, male: 1,01235–39 years, female: 1,02330–34 years, male: 1,08130–34 years, female: 1,08225–29 years, male: 1,08525–29 years, female: 1,06020–24 years, male: 1,01720–24 years, female: 1,03215–19 years, male: 1,16815–19 years, female: 1,17610–14 years, male: 1,18510–14 years, female: 1,0295–9 years, male: 1,2015–9 years, female: 1,2380–4 years, male: 1,0400–4 years, female: 91185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 413 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Delaware County Income

$56,676median household income

Median household income

$56,676

Half of households earn more, half earn less

Median earnings

$35,987

Typical yearly pay for a worker 25 or older.

Poverty rate

19%

About 1 in 5 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Delaware County Marital Status

51% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married51%52%50%
Never married22%26%19%
Divorced15%15%15%
Widowed9%5%13%
Separated3%3%3%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year