As of the 2020 census, its population was 3,539 (down from 3,830 at 2010[3]) and it contained 1,757 housing units.

[4] Oakland City is the township seat.

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

Columbia Township is the center of the East Gibson School Corporation.

Columbia Township residents may request a free library card at the Oakland City-Columbia Township Public Library in Oakland City.