Prescott is a city in Prescott Township, Adams County, Iowa, United States. The population was 191 at the time of the 2020 census. Acco…Prescott is a city in Prescott Township, Adams County, Iowa, United States. The population was 191 at the time of the 2020 census. According to the United States Census Bureau, the city has a total area of 0.40 square miles, all land.