Williamstown Population

2011–2026

4,358

2026 projection

4.5% since 2020 (decrease)

01K2K3K4K5K20122014201620182020202220242026

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.
20264,358+20.05%
20254,356+40.05%
20234,352-1463.25%
20224,498-671.47%
20214,56500.00%
20204,565+591.31%
20194,506+601.35%
20184,446+2175.13%
20174,229-861.99%
20164,315-1222.75%

Showing 10 of 15 years.

Williamstown Demographics

21.9median age

Median age

Female21.9 yrs
Male22.3 yrs

Adults

4,415
764 seniors · 17%3,651 other adults

Sex

Female 55.4% · 2,809Male 44.6% · 2,261

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 51 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

$97,917median household income

Median household income

$97,917

Half of households earn more, half earn less

Median earnings

$85,383

Typical yearly pay for a worker 25 or older.

Poverty rate

18%

About 1 in 6 residents

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

Williamstown Marital Status

22% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married22%24%21%
Never married62%63%61%
Divorced11%8%14%
Widowed5%5%5%
Separated0%0%0%

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