Lake Park is a city in Dickinson County, Iowa, United States. The population was 1,167 at the time of the 2020 census. Trappers Bay S…Lake Park is a city in Dickinson County, Iowa, United States. The population was 1,167 at the time of the 2020 census. Trappers Bay State Park is located just west of the town. Lake Park had its start in the year 1882 by the building of the Burlington, Cedar Rapids and Northern Railway through that territory. Lake Park was incorporated in 1892.