Watertown Population

1880–2026

4,811

2026 projection

2.5% since 2020 (increase)

01K2K3K4K5K18801900192019401960198020002020

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.
20264,811+220.46%
20254,789+60.13%
20244,783-280.58%
20234,811-511.05%
20224,862+310.64%
20214,831+1362.90%
20204,695+1593.51%
20194,536+491.09%
20184,487+992.26%
20174,388+491.13%

Showing 10 of 30 years.

Watertown Demographics

33.3median age

Median age

Female32.3 yrs
Male34.3 yrs

Adults

3,632
541 seniors · 15%3,091 other adults

Sex

Female 50.4% · 2,414Male 49.6% · 2,376

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 48 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

$99,671median household income

Median household income

$99,671

Half of households earn more, half earn less

Median earnings

$56,971

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

Watertown Marital Status

55% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married55%60%51%
Never married34%32%35%
Divorced7%5%10%
Widowed2%1%3%
Separated2%2%1%

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