Northumberland County Population

1790–2026

89,871

2026 projection

1.8% since 2020 (decrease)

020K40K60K80K100K120K140K18001850190019502000

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 Northumberland County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202689,871-490.05%
202589,920-490.05%
202489,969-1700.19%
202390,139+640.07%
202290,075-9030.99%
202190,978-5660.62%
202091,544+8600.95%
201990,684-4400.48%
201891,124-6420.70%
201791,766-5700.62%

Showing 10 of 38 years.

Northumberland County Demographics

44.5median age

Median age

Female46.2 yrs
Male43.1 yrs

Adults

72,741
20,204 seniors (65+) · 28% of adults52,537 other adults

Sex

Female 49% · 44,413Male 51% · 46,147

Population by age

MaleFemale85+ years, male: 78885+ years, female: 1,44380–84 years, male: 1,07280–84 years, female: 1,49575–79 years, male: 1,66175–79 years, female: 1,95770–74 years, male: 2,44770–74 years, female: 2,49065–69 years, male: 3,35665–69 years, female: 3,49560–64 years, male: 3,45760–64 years, female: 3,25955–59 years, male: 3,26755–59 years, female: 3,30550–54 years, male: 3,11050–54 years, female: 2,74145–49 years, male: 2,82545–49 years, female: 2,53940–44 years, male: 2,69340–44 years, female: 2,76835–39 years, male: 3,31535–39 years, female: 2,40330–34 years, male: 2,92630–34 years, female: 2,60425–29 years, male: 2,79925–29 years, female: 2,33020–24 years, male: 2,36220–24 years, female: 2,22115–19 years, male: 2,52415–19 years, female: 2,44210–14 years, male: 2,65710–14 years, female: 2,6015–9 years, male: 2,5275–9 years, female: 2,2520–4 years, male: 2,3610–4 years, female: 2,06885+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K2K2K3K3K

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 906 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

Northumberland County Income

$60,583median household income

Median household income

$60,583

Half of households earn more, half earn less

Median earnings

$45,127

Typical yearly pay for a worker 25 or older.

Poverty rate

12.6%

About 1 in 8 residents

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

Northumberland County Marital Status

49% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married49%49%49%
Never married31%36%26%
Divorced11%10%12%
Widowed7%4%11%
Separated2%2%2%

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