Hanna is an unincorporated community and census-designated place in Hanna Township, LaPorte County, Indiana, United States. As of the 2020 census, Hanna had a population of 450.
Hanna was laid out in 1858. It was named for an Indiana judge with the surname Hanna.
Hanna is located in southern LaPorte County, in the western part of Hanna Township. U.S. Route 30 (Lincoln Highway) passes through the north side of the community, leading west to Valparaiso and east to Plymouth.
According to the United States Census Bureau, the Hanna CDP has an area of , all of it recorded as land.
The population in 2010 was 463.
The school district is South Central Community School Corporation.
Hanna has a branch of the La Porte County Public Library.