Chambersburg, Pennsylvania

== Demographics ==
{{US Census population
|1810= 1304
|1830= 2783
|1840= 3239
|1850= 3335
|1860= 5255
|1870= 6308
|1880= 6877
|1890= 7863
|1900= 8864
|1910= 11800
|1920= 13171
|1930= 13788
|1940= 14852
|1950= 17212
|1960= 17670
|1970= 17315
|1980= 16174
|1990= 16647
|2000= 17862
|2010= 20268
|2020= 21903
|footnote=U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=http://www.census.gov/prod/www/decennial.html|title=Census of Population and Housing|publisher=Census.gov|accessdate=June 4, 2016}}</ref><ref name="USCensusDecennial2020CenPopScriptOnly">{{cite web|url=https://api.census.gov/data/2020/dec/pl?get=P1_001N,NAME&for=place:*&in=state:42&key=5ccd0821c15d9f4520e2dcc0f8d92b2ec9336108|title=Census Population API|publisher=United States Census Bureau|accessdate=Oct 12, 2022}}</ref>
}}
As of the census<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|df=mdy}}</ref> of 2000, there were 17,862 people, 7,722 households, and 4,386 families residing in the borough. The population density was {{convert|2,601.3|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 8,305 housing units at an average density of {{convert|1,209.5|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the borough was 86.43% [[White (U.S. Census)|White]], 7.56% [[African American (U.S. Census)|African American]], 0.18% [[Native American (U.S. Census)|Native American]], 0.87% [[Asian (U.S. Census)|Asian]], 0.05% [[Pacific Islander (U.S. Census)|Pacific Islander]], 3.08% from [[Race (United States Census)|other races]], and 1.83% from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 6.38% of the population.

There were 7,722 households, out of which 24.1% had children under the age of 18 living with them, 41.2% were married couples living together, 11.7% had a female householder with no husband present, and 43.2% were non-families. 37.5% of all households were made up of individuals, and 16.8% had someone living alone who was 65 years of age or older. The average household size was 2.16 and the average family size was 2.83.

In the borough the population was spread out, with 20.8% under the age of 18, 9.1% from 18 to 24, 26.8% from 25 to 44, 20.6% from 45 to 64, and 22.7% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 81.7 males. For every 100 females age 18 and over, there were 77.1 males.

The median income for a household in the borough was $32,336, and the median income for a family was $40,352. Males had a median income of $31,803 versus $21,548 for females. The per capita income for the borough was $19,278. About 9.8% of families and 12.9% of the population were below the poverty line, including 18.3% of those under age 18 and 9.1% of those age 65 or over.