Spring Lake Township is a civil township of Ottawa County in the U.S. state of Michigan. The population was 15,296 according to the 2020 census, up from 14,300 according to the 2010 census. The village of Spring Lake is located within the township. The city of Ferrysburg is south of the township bordering Lake Michigan, the Grand River and Spring Lake. On the south side of the Grand River is the city of Grand Haven and Grand Haven Charter Township.