Wadena is an unincorporated community in Union Township, Benton County, in the U.S. state of Indiana.

A monument east of town commemorates Wadena School, which served the township's students from 1895 to 1961.

The fire occurred just before midnight in the 2500 East block of 600 North, where authorities found two adults and four juveniles trapped inside the home.

Carpenter Creek, which meets the Iroquois River about 14 miles to the north, begins northeast of Wadena.

Mount Nebo, the highest point in Benton County, stands a little less than two miles to the east.