Kensett is a city in Worth County, Iowa, United States. The population was 257 at the time of the 2020 census. It is part of the Mason City Micro…Kensett is a city in Worth County, Iowa, United States. The population was 257 at the time of the 2020 census. It is part of the Mason City Micropolitan Statistical Area. Kensett was platted in 1872 shortly after the railroad was built through that territory in 1871.