Halbert Township is one of six townships in Martin County, Indiana, United States. As of the 2020 census, its population was 1,545 and it contained 711 housing units.
According to the 2010 census, the township has a total area of , of which (or 99.14%) is land and (or 0.84%) is water.
The township contains these five cemeteries: Acre, Baxter, Elliott, Hawkins and Union Chapel.