Monroe Township is one of nine townships in Pike County, Indiana, United States. As of the 2020 census, its population was 623 and it contained 297 housing units.

Historical population

Census	Pop.	Note	%±
1890	2,240		—
1900	2,264		1.1%
1910	2,037		−10.0%
1920	1,616		−20.7%
1930	1,737		7.5%
1940	1,521		−12.4%
1950	1,218		−19.9%
1960	927		−23.9%
1970	842		−9.2%
1980	839		−0.4%
1990	733		−12.6%
2000	715		−2.5%
2010	673		−5.9%
2020	623		−7.4%
Source: US Decennial Census

According to the 2010 census, the township has a total area of 43.67 square miles (113.1 km), of which 42.46 square miles (110.0 km) (or 97.23%) is land and 1.21 square miles (3.1 km) (or 2.77%) is water.

• Spurgeon

• Coe at 38°18′23″N 87°15′29″W / 38.306438°N 87.258064°W / 38.306438; -87.258064
• Enos Corner at 38°17′21″N 87°15′40″W / 38.289216°N 87.26112°W / 38.289216; -87.26112
• Oakland City Junction at 38°19′54″N 87°18′05″W / 38.331715°N 87.301400°W / 38.331715; -87.301400
• Scottsburg at 38°17′19″N 87°13′09″W / 38.288661°N 87.219174°W / 38.288661; -87.219174

(This list is based on USGS data and may include former settlements.)

The township contains these five cemeteries: Coleman, Davis, Saint Pauls, Simpson and Union.

• SR 61

• Enos Lake
• Grey Lake

• Pike County School Corporation

• State House District 63
• State Senate District 48

• "Monroe Township, Pike County, Indiana". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved November 26, 2009.
• United States Census Bureau 2009 TIGER/Line Shapefiles
• IndianaMap

• Indiana Township Association
• United Township Association of Indiana
• City-Data.com page for Monroe Township