Johnstown, Pennsylvania
Demographics
As of the census of 2010, there were 20,978 people, 9,917 households, and 5,086 families residing in the city. The population density was 3,555.6 people per square mile (1,371.1/km²).

Johnstown, Pennsylvania

Section Title: Demographics
Table Section Text: As of the census of 2010, there were 20,978 people, 9,917 households, and 5,086 families residing in the city. The population density was 3,555.6 people per square mile (1,371.1/km²).

Historical population

Census	Pop.	%±

1840	949	—

1850	1,269	33.7%

1860	4,185	229.8%

1870	6,028	44.0%

1880	8,380	39.0%

1890	21,805	160.2%

1900	35,936	64.8%

1910	55,482	54.4%

1920	67,327	21.3%

1930	66,993	−0.5%

1940	66,668	−0.5%

1950	63,232	−5.2%

1960	53,949	−14.7%

1970	42,476	−21.3%

1980	35,496	−16.4%

1990	28,134	−20.7%

2000	23,906	−15.0%

2010	20,978	−12.2%

Est. 2017	19,643	−6.4%

U.S. Decennial Census 2013 Estimate

Sentence(s)

The population was 20,978 as of the 2010 census.

final_sentence: The population was 20,978 as of the 2010 census.