Jasper is a city in and the county seat of Dubois County, Indiana, United States, located along the Patoka River. The population was 16,703 at the 2020 census making it the 48th most populous city in Indiana. On November 4, 2007, Dubois County returned to the Eastern Time Zone, after having moved to the Central Time Zone the previous year. Land use in the area is primarily agricultural. The Indiana Baseball Hall of Fame, which honors players and others associated with the national pastime who were born or lived in Indiana, is located in Jasper.