Johnson Township, Knox County, Indiana
|• Type||Indiana township|
|• Total||50.98 sq mi (132.0 km2)|
|• Land||50.51 sq mi (130.8 km2)|
|• Water||0.47 sq mi (1.2 km2)|
|Elevation||502 ft (153 m)|
|• Density||27.4/sq mi (10.6/km2)|
|GNIS feature ID||453513|
Johnson Township is named for Thomas Johnson, an early pioneer settler who arrived in 1800, settling on land that later became the Purcell Station area. His son Thomas Johnson Jr. expanded the property and married into the Catt family. 
According to the 2010 census, the township has a total area of 50.98 square miles (132.0 km2), of which 50.51 square miles (130.8 km2) (or 99.08%) is land and 0.47 square miles (1.2 km2) (or 0.92%) is water.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "Population, Housing Units, Area, and Density: 2010 - County -- County Subdivision and Place -- 2010 Census Summary File 1". United States Census. Retrieved 2013-05-10.
- History of Knox and Daviess County, Indiana: From the Earliest Time to the Present. Goodspeed. 1886. p. 81.
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