Holland is a city in Grundy County, Iowa, United States. The population was 269 at the time of the 2020 census. It is part of the Waterloo–Ce…Holland is a city in Grundy County, Iowa, United States. The population was 269 at the time of the 2020 census. It is part of the Waterloo–Cedar Falls Metropolitan Statistical Area. Holland is located at 42°23′59″N 92°47′58″W / 42.39972°N 92.79944°W.