Blissville Township is one of sixteen townships in Jefferson County, Illinois, USA. As of the 2010 census, its population was 404 and it contained 172 housing units.

According to the 2010 census, the township has a total area of 34.75 square miles (90.0 km), of which 34.71 square miles (89.9 km) (or 99.88%) is land and 0.03 square miles (0.078 km) (or 0.09%) is water. The township is centered at 38°15'N 89°5'W (38.257,-89.088).

• Waltonville (northwest quarter)

• Williamsburg at 38°13′41″N 89°03′32″W / 38.228°N 89.059°W / 38.228; -89.059

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

• Casner Township (north)
• McClellan Township (east)
• Elk Prairie Township (southeast)
• Bald Hill Township (south)
• DuBois Township, Washington County (west)
• Ashley Township, Washington County (northwest)

The township contains these six cemeteries: Gilbert, Knob Prairie, Minson, Mount Zion, Quinn and Taylor.

Historical population

Census	Pop.	Note	%±
2016 (est.)	404
U.S. Decennial Census

• Waltonville Community Unit School District 1

• Illinois's 19th congressional district
• State House District 107
• State Senate District 54

• "Blissville Township, Jefferson County, Illinois". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved January 17, 2010.
• United States Census Bureau 2007 TIGER/Line Shapefiles
• United States National Atlas

• City-Data.com
• Illinois State Archives