Washington County, Iowa
Demographics

Washington County, Iowa

Section Title: Demographics
Table Section Text: None

Historical population

Census	Pop.	%±

1850	4,957	—

1860	14,235	187.2%

1870	18,952	33.1%

1880	20,374	7.5%

1890	18,468	−9.4%

1900	20,718	12.2%

1910	19,925	−3.8%

1920	20,421	2.5%

1930	19,822	−2.9%

1940	20,055	1.2%

1950	19,557	−2.5%

1960	19,406	−0.8%

1970	18,967	−2.3%

1980	20,141	6.2%

1990	19,612	−2.6%

2000	20,670	5.4%

2010	21,704	5.0%

Est. 2016	22,281	2.7%

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

Sentence(s)

As of the census of 2000, there were 20,670 people residing in Washington County, Iowa.

final_sentence: As of the census of 2000, there were 20,670 people residing in Washington County, Iowa.