Sullivan County, Indiana
Demographics
As of the 2010 United States Census, there were 21,475 people, 7,823 households, and 5,422 families residing in the county. The population density was 48.0 inhabitants per square mile (18.5/km²).

Sullivan County, Indiana

Section Title: Demographics
Table Section Text: As of the 2010 United States Census, there were 21,475 people, 7,823 households, and 5,422 families residing in the county. The population density was 48.0 inhabitants per square mile (18.5/km²).

Historical population

Census	Pop.	%±

1820	3,498	—

1830	4,630	32.4%

1840	8,315	79.6%

1850	10,141	22.0%

1860	15,064	48.5%

1870	18,453	22.5%

1880	20,336	10.2%

1890	21,877	7.6%

1900	26,005	18.9%

1910	32,439	24.7%

1920	31,630	−2.5%

1930	28,133	−11.1%

1940	27,014	−4.0%

1950	23,667	−12.4%

1960	21,721	−8.2%

1970	19,889	−8.4%

1980	21,107	6.1%

1990	18,993	−10.0%

2000	21,751	14.5%

2010	21,475	−1.3%

Est. 2016	20,802	−3.1%

U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2013

Sentence(s)

As of 2010, the population was 21,475.

final_sentence: As of 2010, the population was 21,475.