Watertown Population

1850–2026

22,644

2026 projection

1.5% since 2020 (decrease)

05K10K15K20K25K186018801900192019401960198020002020

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 Watertown. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202622,644-600.26%
202522,704-370.16%
202422,741-190.08%
202322,760-360.16%
202222,796-1450.63%
202122,941-390.17%
202022,980-4862.07%
201923,466-1470.62%
201823,613-270.11%
201723,640+190.08%

Showing 10 of 33 years.

Watertown Demographics

40.6median age

Median age

Female40.5 yrs
Male40.7 yrs

Adults

17,753
4,469 seniors · 25%13,284 other adults

Sex

Female 54.7% · 12,450Male 45.3% · 10,324

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 228 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

Watertown Income

$70,107median household income

Median household income

$70,107

Half of households earn more, half earn less

Median earnings

$45,720

Typical yearly pay for a worker 25 or older.

Poverty rate

9.9%

About 1 in 10 residents

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

Watertown Marital Status

46% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married46%51%41%
Never married34%36%32%
Divorced14%9%17%
Widowed6%4%8%
Separated<1%<1%<1%

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