Idaville is a census-designated place in Lincoln Township, White County, in the U.S. state of Indiana. As of the 2020 census, Idaville had a population of 440.
Idaville was originally called Hannah, and under the latter name was laid out in 1860, when the railroad was extended to that point. A post office has been in operation under the name Idaville since 1860.
Idaville is located at .
The 2010 population of Idaville, Indiana was 461 people, made up of 253 males, and 208 females.
The estimated median household income was $53,060 in 2017.
Idaville is mentioned in the Season 07, Episode 13 of M*A*S*H, "Out of Gas".