Watertown Population

1870–2026

23,341

2026 projection

5% since 2020 (decrease)

05K10K15K20K25K30K35K18801900192019401960198020002020

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.
202623,341-1760.75%
202523,517-3401.43%
202423,857-2511.04%
202324,108-2821.16%
202224,390-2771.12%
202124,667+1090.44%
202024,558-2981.20%
201924,856-5622.21%
201825,418-3371.31%
201725,755+80.03%

Showing 10 of 31 years.

Watertown Demographics

35.7median age

Median age

Female37.9 yrs
Male33.6 yrs

Adults

19,136
3,894 seniors · 20%15,242 other adults

Sex

Female 50.7% · 12,364Male 49.3% · 12,011

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 244 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

$51,753median household income

Median household income

$51,753

Half of households earn more, half earn less

Median earnings

$40,864

Typical yearly pay for a worker 25 or older.

Poverty rate

20.1%

About 1 in 5 residents

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

Watertown Marital Status

40% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married40%40%39%
Never married39%45%33%
Divorced14%11%18%
Widowed5%2%8%
Separated2%2%2%

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