Williamstown Population

1830–2026

4,044

2026 projection

3.3% since 2020 (increase)

01K2K3K4K5K1850190019502000

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 Williamstown. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
20264,044+140.35%
20254,030+571.43%
20243,973+40.10%
20233,969+130.33%
20223,956+120.30%
20213,944+290.74%
20203,915+30.08%
20193,912-60.15%
20183,918+80.20%
20173,910+30.08%

Showing 10 of 34 years.

Williamstown Demographics

31median age

Median age

Female29.4 yrs
Male32.9 yrs

Adults

2,660
396 seniors · 15%2,264 other adults

Sex

Female 55.2% · 2,178Male 44.8% · 1,767

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 39 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

Williamstown Income

$95,050median household income

Median household income

$95,050

Half of households earn more, half earn less

Median earnings

$50,906

Typical yearly pay for a worker 25 or older.

Poverty rate

7.7%

About 1 in 13 residents

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

Williamstown Marital Status

45% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married45%50%41%
Never married35%36%35%
Divorced10%12%10%
Widowed6%2%10%
Separated3%1%5%

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