Daviess County courthouse in Washington
"A City of Pride and Progress"
Location of Washington in Daviess County, Indiana.
WASHINGTON INDIANA Latitude and Longitude:
|• Mayor||Joseph “Joe” Wellman ( R)|
|• Total||4.77 sq mi (12.35 km2)|
|• Land||4.73 sq mi (12.25 km2)|
|• Water||0.04 sq mi (0.10 km2) 0.84%|
|Elevation||502 ft (153 m)|
| • Estimate |
|• Density||2,555.27/sq mi (986.68/km2)|
|Time zone||UTC-5 ( EST)|
|• Summer ( DST)||UTC-4 ( EDT)|
|Area code(s)||812, 930|
|FIPS code||18-80504 |
|GNIS feature ID||0445496 |
Washington is a city in Daviess County, Indiana, United States. The population was 11,509 at the 2010 census. The city is the county seat of Daviess County.  It is also the principal city of the Washington, IN Micropolitan Statistical Area, which comprises all of Daviess County and had an estimated 2017 population of 31,648.
The railroad was built through Washington in 1857.  By 1889, it was a major depot and repair yard for the Ohio and Mississippi Railroad. The Baltimore and Ohio Railroad took over the line in 1893. During this time, the railroad employed over 1,000 workers. 
The Magnus J. Carnahan House, Daviess County Courthouse, Thomas Faith House, Robert C. Graham House, Dr. John A. Scudder House, Washington Commercial Historic District, and Dr. Nelson Wilson House are listed on the National Register of Historic Places. 
Washington is located at (38.658207, -87.175111).
According to the 2010 census, Washington has a total area of 4.767 square miles (12.35 km2), of which 4.73 square miles (12.25 km2) (or 99.22%) is land and 0.037 square miles (0.10 km2) (or 0.78%) is water. 
The climate in this area is characterized by hot, humid summers and generally mild to cold winters. According to the Köppen Climate Classification system, Washington has a humid subtropical climate, abbreviated "Cfa" on climate maps. 
|U.S. Decennial Census |
As of the census  of 2010, there were 11,509 people, 4,558 households, and 2,849 families residing in the city. The population density was 2,433.2 inhabitants per square mile (939.5/km2). There were 5,067 housing units at an average density of 1,071.2 per square mile (413.6/km2). The racial makeup of the city was 89.2% White, 1.1% African American, 0.3% Native American, 1.1% Asian, 0.1% Pacific Islander, 6.4% from other races, and 1.9% from two or more races. Hispanic or Latino of any race were 9.6% of the population.
There were 4,558 households of which 33.4% had children under the age of 18 living with them, 41.8% were married couples living together, 15.2% had a female householder with no husband present, 5.5% had a male householder with no wife present, and 37.5% were non-families. 31.8% of all households were made up of individuals and 14.9% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.04.
The median age in the city was 37.3 years. 25.5% of residents were under the age of 18; 9.4% were between the ages of 18 and 24; 24% were from 25 to 44; 25.2% were from 45 to 64; and 15.9% were 65 years of age or older. The gender makeup of the city was 48.2% male and 51.8% female.
As of the census  of 2000, there were 11,380 people, 4,658 households, and 2,897 families residing in the city. The population density was 2,404.0 people per square mile (928.9/km2). There were 5,077 housing units at an average density of 1,072.5 per square mile (414.4/km2). The racial makeup of the city was 95.30% White, 0.91% African American, 0.30% Native American, 0.39% Asian, 0.05% Pacific Islander, 2.20% from other races, and 0.85% from two or more races. Hispanic or Latino of any race were 4.15% of the population.
There were 4,658 households out of which 30.6% had children under the age of 18 living with them, 45.9% were married couples living together, 12.5% had a female householder with no husband present, and 37.8% were non-families. 33.2% of all households were made up of individuals and 16.1% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.99.
In the city, the population was spread out with 25.5% under the age of 18, 8.3% from 18 to 24, 26.1% from 25 to 44, 21.7% from 45 to 64, and 18.3% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 89.7 males. For every 100 females age 18 and over, there were 84.7 males.
The median income for a household in the city was $29,055, and the median income for a family was $37,713. Males had a median income of $30,570 versus $19,306 for females. The per capita income for the city was $16,721. About 9.8% of families and 14.3% of the population were below the poverty line, including 19.3% of those under age 18 and 10.4% of those age 65 or over.
- I-69 - Interstate 69 bypasses the city to the east.
- US 50 / US 150 - US 50 and US 150 Bypass the city to the south.
- SR 57 - SR 57 runs through downtown and runs north to Plainville, and south to Petersburg
- SR 257 - SR 257 begins southeast of the city at the US 50/150 Bypass, and runs south to Otwell
The town has a free lending library, the Washington Carnegie Public Library. 
Washington still retains a number of architecturally historical buildings. The Helphenstine House, built in 1847, displays Greek Revival architecture styles. The Robert C. Graham House was owned by an Indiana car manufacturer and was built in 1912. It is an example of Frank Lloyd Wright's Prairie School of Architecture and is listed on the National Register of Historic Places. It has marble fireplaces, crystal-glass French windows, a billiards room and parquet floors. On Main Street of Washington is the Daviess County Historical Society Museum,  a collection of history related to Daviess County and Indiana. The museum features a funeral practices exhibit, a military history room, an art gallery, a Civil War display with an 1855 slave collar and a Civil War era regimental flag, a school room, and an archives room for genealogists as well as a gift shop.
- Charles "Bud" Dant, musician
- Don C. Faith, Jr., United States Army
- Chuck Harmon, baseball player
- Anthony R. Jones, Lt. General United States Army
- Leo Klier, basketball player
- Johnny Ringo, outlaw
- Patrick Summers, conductor
- Charles Thorn, string theorist
- Cody Zeller, basketball player
- Luke Zeller, basketball player
- Tyler Zeller, basketball player
- "2016 U.S. Gazetteer Files". United States Census Bureau. Retrieved Jul 28, 2017.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-11.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- Hellmann, Paul T. (14 February 2006). Historical Gazetteer of the United States. Routledge. p. 332. ISBN 1-135-94859-3.
- Baker, Ronald L. (October 1995).
From Needmore to Prosperity: Hoosier Place Names in Folklore and History. Indiana University Press. p. 338.
The present name is for Washington Township...
- History of Knox and Daviess County, Indiana: From the Earliest Time to the Present; with Biographical Sketches, Reminiscences, Notes, Etc. ; Together with an Extended History of the Colonial Days of Vincennes, and Its Progress Down to the Formation of the State Government. Goodspeed. 1886. p. 678.
- Douglas Wissing (1 March 2001). Scenic Driving Indiana. Globe Pequot. p. 4. ISBN 978-1-56044-906-5. Retrieved 23 November 2011.
- "Tornado Destroys 20 Homes, Cuts Power In Washington, Ind". Indiana Public Media. Retrieved 2013-12-19.
- "Preliminary reports show 11 tornadoes hit Indiana". Fox 59 News. Retrieved 2013-12-19.
- National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "G001 - Geographic Identifiers - 2010 Census Summary File 1". United States Census Bureau. Retrieved 2015-07-29.
- Climate Summary for Washington, Indiana
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.
- "Indiana public library directory" (PDF). Indiana State Library. Retrieved 4 March 2018.
|Wikimedia Commons has media related to Washington, Indiana.|
|Wikisource has the text of a 1921 Collier's Encyclopedia article about Washington, Indiana.|