Watertown, Wisconsin Population

Current Population

22,704

Estimated July 1, 2025

-276 residents(-1.2%)since 2020

Annual change-0.2%2024–2025

Latest Official Census

22,926

2020 Census

cityJefferson & Dodge counties

Population Over Time

Estimated population changed from 22,980 in 2020 to 22,704 in 2025.

Annual population estimates by year.
Year	Population	Change	% change
2020	22,980	—	—
2021	22,941	-39	-0.2%
2022	22,796	-145	-0.6%
2023	22,760	-36	-0.2%
2024	22,741	-19	-0.1%
2025	22,704	-37	-0.2%

2020 Census (official count): 22,926

Census History

Official Decennial Census counts. Each is an enumeration taken on April 1 of its census year, separate from the annual estimates above.

Official Decennial Census counts by census year.
Census	Population
2010 Census	23,861
2020 Census	22,926

Insights

Watertown's population declined 3.9% from 2010 to 2020.
Source: U.S. Census Bureau — 2020 Census Redistricting Data (P.L. 94-171), table P1
How this was determined
Strongest eligible observation in category "change" (score 66.81, confidence 75); chosen from 1 eligible candidate(s).
Compared against: U.S. places
Confidence: 75/100
Watertown is Wisconsin's 37th-largest incorporated place by population.
Source: U.S. Census Bureau — Subcounty Resident Population Estimates (SUB-EST2025), Vintage 2025
How this was determined
Strongest eligible observation in category "perspective" (score 65.25, confidence 85); chosen from 1 eligible candidate(s).
Compared against: incorporated places in Wisconsin
Confidence: 85/100

Sources & Methodology

The current population figure is an annual estimate from the U.S. Census Bureau's Population Estimates Program. The 2020 Census is shown separately as the official benchmark.

Current estimate — 22,704 · July 1, 2025

U.S. Census Bureau — Subcounty Resident Population Estimates (SUB-EST2025), Vintage 2025

Official Census — 22,926 · April 1, 2020

U.S. Census Bureau — 2020 Census Redistricting Data (P.L. 94-171), table P1

These figures can differ because the Census and annual population estimates are produced at different times using different methods. Both are shown so you can distinguish the most current estimate from the official Census benchmark.

How the change since 2020 is calculated

Both endpoints come from the same Census Bureau Population Estimates Program release, so the comparison is like for like: 22,980 on July 1, 2020 and 22,704 on July 1, 2025. The change is the later estimate minus the earlier one (-276), and the percentage is that change divided by the 2020 estimate (-1.2%). The Decennial Census count is never used as an endpoint here — it is an enumeration on a different reference date, produced by a different method, so subtracting one from the other would measure the difference between two methods as well as the change in population.