Fremont is a city in and the county seat of Sandusky County, Ohio, United States, along the Sandusky River. It is about 35 miles southeast of Toledo and 25 miles west of Sandusky. The population was 15,930 at the 2020 census. The city was the home of Rutherford B. Hayes, who served as President of the United States from 1877 to 1881. The Rutherford B. Hayes Presidential Center was the first presidential library and is one of the focal points of the city.