Watertown, South Dakota

==Demographics==
{{US Census population
|1880= 746
|1890= 2672
|1900= 3352
|1910= 7010
|1920= 9400
|1930= 10214
|1940= 10617
|1950= 12699
|1960= 14077
|1970= 13388
|1980= 15649
|1990= 17592
|2000= 20237
|2010= 21482
|2020= 22655
|estyear=2022
|estimate=23019
|estref=<ref name="USCensusEst2022">{{cite web|url=https://www.census.gov/data/tables/time-series/demo/popest/2020s-total-cities-and-towns.html|date=July 21, 2023|title=City and Town Population Totals: 2020-2022|publisher=United States Census Bureau|accessdate=July 21, 2023}}</ref>
|align-fn=center
|footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=Census of Population and Housing|author=United States Census Bureau|author-link=United States Census Bureau|access-date=September 23, 2013}}</ref><br>2020 Census<ref name="2020 Census (City)"/>
}}

The [[per capita income]] for the city was $18,994. About 5.7% of families and 9.3% of the population were below the [[poverty line]], including 8.5% of those under age 18 and 11.0% of those age 65 or over.<ref>''Watertown, South Dakota: Now.'' Watertown Area Chamber of Commerce and Convention and Visitors Bureau, 2006</ref>

===2010 census===
As of the [[census]] of 2010, there were 21,482 people, 9,278 households, and 5,563 families residing in the city. The [[population density]] was {{convert|1231.3|PD/sqmi|PD/km2|1}}. There were 10,050 housing units at an average density of {{convert|575.9|/sqmi|/km2|1}}. The racial makeup of the city was 94.8% [[White (U.S. Census)|White]], 0.4% [[African American (U.S. Census)|African American]], 2.4% [[Native American (U.S. Census)|Native American]], 0.5% [[Asian (U.S. Census)|Asian]], 0.5% from [[Race (U.S. Census)|other races]], and 1.4% from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 1.6% of the population.

There were 9,278 households, of which 29.6% had children under the age of 18 living with them, 45.7% were [[Marriage|married couples]] living together, 10.0% had a female householder with no husband present, 4.3% had a male householder with no wife present, and 40.0% were non-families. 33.0% of all households were made up of individuals, and 12.4% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.90.

The median age in the city was 36.6 years. 24.2% of residents were under the age of 18; 10.3% were between the ages of 18 and 24; 24.9% were from 25 to 44; 25.2% were from 45 to 64; and 15.4% were 65 years of age or older. The gender makeup of the city was 49.2% male and 50.8% female.

===2000 census===
As of the [[census]] of 2000, there were 20,237 people, 8,385 households, and 5,290 families residing in the city. The population density was {{convert|1,328.9|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 9,193 housing units at an average density of {{convert|603.7|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the city was 96.25% [[White (U.S. Census)|White]], 0.14% [[African American (U.S. Census)|African American]], 1.65% [[Native American (U.S. Census)|Native American]], 0.33% [[Asian (U.S. Census)|Asian]], 0.02% [[Pacific Islander (U.S. Census)|Pacific Islander]], 0.71% from [[Race (United States Census)|other races]], and 0.90% from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 1.28% of the population. 47.1% were of [[germans|German]], 19.8% [[norwegians|Norwegian]] and 5.9% [[irish people|Irish]] ancestry. 96.5% spoke [[english language|English]], 1.7% [[spanish language|Spanish]] and 1.1% [[german language|German]] as their first language.

There were 8,385 households, out of which 31.9% had children under the age of 18 living with them, 50.6% were [[Marriage|married couples]] living together, 8.8% had a female householder with no husband present, and 36.9% were non-families. 30.5% of all households were made up of individuals, and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.98.

In the city, the population was spread out, with 25.9% under the age of 18, 11.3% from 18 to 24, 27.9% from 25 to 44, 19.9% from 45 to 64, and 15.0% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 96.6 males. For every 100 [[females]] age 18 and over, there were 93.9 [[males]].