what county is valparaiso indiana in
Sponsored Topics. Valparaiso ( /ËvÉËlpÉreÉªzoÊ/ vahl-pÉ-ray-zoh) is a city in Porter County, Indiana, United States, and is the southeasternmost suburb of the Chicago metropolitan area. It is the county seat of Porter County. The population was 31,730 at the 2010 census, making it the 2nd largest city in Porter County.