Somerset County Population

1790–2026

357.85K

2026 projection

3.9% since 2020 (increase)

0100K200K300K400K18001850190019502000

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 Somerset County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026357,850+1,3640.38%
2025356,486+1,3640.38%
2024355,122+4,0801.16%
2023351,042+3,4210.98%
2022347,621+1,5520.45%
2021346,069+1,5530.45%
2020344,516+14,5184.40%
2019329,998-7740.23%
2018330,772+1220.04%
2017330,650+6470.20%

Showing 10 of 38 years.

Somerset County Demographics

41.8median age

Median age

Female42.9 yrs
Male41 yrs

Adults

275,802
59,537 seniors (65+) · 22% of adults216,265 other adults

Sex

Female 50.7% · 177,430Male 49.3% · 172,416

Population by age

MaleFemale85+ years, male: 2,40885+ years, female: 4,88580–84 years, male: 3,23280–84 years, female: 4,29875–79 years, male: 4,48475–79 years, female: 6,01070–74 years, male: 6,81470–74 years, female: 7,31965–69 years, male: 9,52565–69 years, female: 10,56260–64 years, male: 12,22160–64 years, female: 12,85755–59 years, male: 13,33655–59 years, female: 13,30150–54 years, male: 12,95050–54 years, female: 12,99945–49 years, male: 12,09145–49 years, female: 12,09040–44 years, male: 11,62240–44 years, female: 11,44735–39 years, male: 11,40035–39 years, female: 11,88030–34 years, male: 10,28330–34 years, female: 10,21225–29 years, male: 9,83725–29 years, female: 9,81920–24 years, male: 10,04020–24 years, female: 10,21715–19 years, male: 11,78215–19 years, female: 10,70510–14 years, male: 11,16710–14 years, female: 10,9265–9 years, male: 10,4335–9 years, female: 9,4560–4 years, male: 8,7910–4 years, female: 8,44785+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45K5K10K10K

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 3,498 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

Somerset County Income

$140,374median household income

Median household income

$140,374

Half of households earn more, half earn less

Median earnings

$78,435

Typical yearly pay for a worker 25 or older.

Poverty rate

5.4%

About 1 in 19 residents

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

Somerset County Marital Status

56% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married56%58%53%
Never married31%33%29%
Divorced8%6%9%
Widowed5%2%8%
Separated1%<1%1%

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