Williams is a city in Hamilton County, Iowa, United States. The population was 307 at the time of the 2020 census. Williams is a regional center of wind power generation.

Hamilton County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 15,039. The county seat is Webster City. The county was named to honor William W. Hamilton, a President of the Iowa State Senate.