Columbia Township is one of the nine townships within Whitley County, Indiana, United States. As of the 2020 census, the township's population was recorded at 11,715 (up from 11,047 at 2010), with a total of 5,107 housing units within its boundaries.

Based on data from the 2010 census, Columbia Township encompasses a total area of 36.73 square miles (95.1 km2). Within this expanse, 36.71 square miles (95.1 km2), equivalent to 99.95% of the total area, constitutes land, while a minor portion of 0.02 square miles (0.052 km2), equivalent to 0.05%, consists of water bodies. The landscape of the township contains several watercourses, including Blue Babe Branch, Blue River and Stony Creek.

• Columbia City (vast majority)

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

• Thorncreek Township (north)
• Union Township (east)
• Jefferson Township (southeast)
• Washington Township (south)
• Cleveland Township (southwest)
• Richland Township (west)

The township contains fourteen cemeteries: Brown, Compton/Oak Grove, County Home, Eberhard, Greenhill, Hell’s Half Acre, Nolt(Beaver Reserve), Potter’s Field, Ream(Bethel), Saint Peter, Shoemaker, South Park, South Park Annex and Spooktown.

• U.S. Route 30
• Indiana State Road 9
• Indiana State Road 109
• Indiana State Road 205

• "Columbia Township, Whitley County, Indiana". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved September 24, 2009.
• United States Census Bureau cartographic boundary files

• Indiana Township Association
• United Township Association of Indiana