Greenfield is a city and county seat of Adair County, Iowa, United States. As of the 2020 census, the city population was 2,062. History The area around Greenfield was settled in 1854. The plan for the town of Greenfield was created in 1856 when the land was purchased by Milton C. Munger. Munger is responsible for the design of Greenfield's unique Lancaster-style town square, and the city park located at Grant and NE Second Street was also included in the original plat. Greenfield is named after Greenfield, Massachusetts. Greenfield became the county seat in 1875, after battling out nearby Fontanelle for the title. The city was incorporated on May 22, 1876. Greenfield is home to four entries on the National Register of Historic Places, the E. E. Warren Opera House listed in 1970; the Adair County Courthouse, listed in 1981; the Adair County Democrat/Adair County Free Press building, listed 2012; and Hotel Greenfield, listed 2012. Geography Greenfield is located at (41.305491, -94.458726). According to the United States Census Bureau, the city has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 1,982 people, 894 households, and 537 families residing in the city. The population density was . There were 1,000 housing units at an average density of . The racial makeup of the city was 98.0% White, 0.2% African American, 0.1% Native American, 0.4% Asian, 0.8% from other races, and 0.7% from two or more races. Hispanic or Latino of any race were 2.2% of the population. There were 894 households, of which 25.8% had children under the age of 18 living with them, 48.2% were married couples living together, 8.5% had a female householder with no husband present, 3.4% had a male householder with no wife present, and 39.9% were non-families. 35.8% of all households were made up of individuals, and 18.4% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.81. The median age in the city was 45.2 years. 22.4% of residents were under the age of 18; 6.8% were between the ages of 18 and 24; 20.6% were from 25 to 44; 26.3% were from 45 to 64; and 24% were 65 years of age or older. The gender makeup of the city was 47.8% male and 52.2% female. 2000 census As