Bremer County is a county in the northeastern part of the U.S. state of Iowa. As of the 2020 Census, the population was 24,988. Its county seat is Waverly. The county was named for Fredrika Bremer, a Swedish feminist writer.

Waverly is a city in Bremer County, Iowa, United States. The population was 10,394 at the time of the 2020 census. It is the county seat of Bremer County and is part of the Waterloo–Cedar Falls Metropolitan Statistical Area.