Editing Gardner, Massachusetts (section)

==Demographics==
{{Historical populations
|type= USA
|align= left
|state= expanded
|1790|531
|1800|667
|1810|815
|1820|911
|1830|1023
|1840|1260
|1850|1533
|1860|2646
|1870|3333
|1880|4988
|1890|3424
|1900|10813
|1910|14699
|1920|16971
|1930|19399
|1940|20206
|1950|19581
|1960|19038
|1970|19748
|1980|17900
|1990|20125
|2000|20770
|2010|20228
|2020|21287
|2022|20902
|source={{center|U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=Census of Population and Housing|publisher=Census.gov|access-date=June 4, 2015}}</ref><ref>{{cite web | title=City and Town Population Totals: 2020−2022| publisher=[[United States Census Bureau]] | access-date=November 25, 2023 | url=https://www.census.gov/data/tables/time-series/demo/popest/2020s-total-cities-and-towns.html}}</ref>}}
}}

As of the [[United States Census]] of 2000, there were 20,770 people, 8,282 households, and 5,085 families residing in Gardner. The [[population density]] was 931.0 people per square mile in 2018.<ref>{{cite web |title=Population Density |url=https://www.opendatanetwork.com/entity/1600000US2525485/Gardner_MA/geographic.population.density?year=2018 |website=Open Data Network |access-date=19 June 2022 |quote=The last measured population density for Gardner, MA was 931 in 2018. Gardner, MA experienced an average growth rate of -0.24% from the first statistic recorded in 2009. If past trends continue, Open Data forecast the population density to be 919 by 2023.  Population Density is computed by dividing the total population by Land Area Per Square Mile. Based on data from the U.S. Census American Community Survey, ODN Dataset, API}}</ref><ref name="GR2">{{cite web |url=https://www.census.gov |publisher=[[United States Census Bureau]] |access-date=2008-01-31 |title=U.S. Census website }}</ref> There were 8,838 housing units at an average density of {{convert|398.3|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the city was 93.13% [[White (U.S. Census)|White]], 2.29% [[African American (U.S. Census)|African American]], 0.34% [[Native American (U.S. Census)|Native American]], 1.37% [[Asian (U.S. Census)|Asian]], 0.08% [[Pacific Islander (U.S. Census)|Pacific Islander]], 1.22% from [[Race (United States Census)|other races]], and 1.58% from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 4.08% of the population, while 19.6% were of [[French Canadian]], 17.6% French, 12.7% Irish, 6.7% English, 6.3% [[Polish people|Polish]] and 6.2% [[Italians|Italian]] ancestry.

There were 8,282 households, out of which 30.3% had children under the age of 18 living with them, 44.4% were married couples living together, 12.7% had a female householder with no husband present, and 38.6% were non-families. Of all households, 32.4% were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.97.

In the city, the population was spread out, with 23.7% under the age of 18, 7.7% from 18 to 24, 31.8% from 25 to 44, 20.7% from 45 to 64, and 16.1% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 105.1 males. For every 100 females age 18 and over, there were 103.7 males.

The median income for a household in the city was $37,334, and the median income for a family was $47,164. Males had a median income of $35,804 versus $26,913 for females. The [[per capita income]] for the city was $18,624. About 7.0% of families and 9.6% of the population were below the [[poverty line]], including 12.8% of those under age 18 and 11.7% of those age 65 or over.