Fillmore is a city in Andrew County, Missouri, United States. The population was 184 at the 2010 census.HistoryFillmore was laid out in 1845. It was named for Millard Fillmore, a statesman, and afterward 13th President of the United States. A post office called Fillmore has been in operation since 1851.GeographyFillmore is located at .According to the United States Census Bureau, the city has a total area of 0.14sqmi, all of it land.Demographics2010 censusAs of the census of 2010, there were 184 people, 70 households, and 50 families residing in the city. The population density was 1314.3PD/sqmi. There were 89 housing units at an average density of 635.7/sqmi. The racial makeup of the city was 98.4% White, 0.5% Native American, and 1.1% from two or more races.There were 70 households of which 42.9% had children under the age of 18 living with them, 50.0% were married couples living together, 14.3% had a female householder with no husband present, 7.1% had a male householder with no wife present, and 28.6% were non-families. 24.3% of all households were made up of individuals and 4.3% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.20.The median age in the city was 31.5 years. 34.2% of residents were under the age of 18; 7.1% were between the ages of 18 and 24; 26.6% were from 25 to 44; 23.8% were from 45 to 64; and 8.2% were 65 years of age or older. The gender makeup of the city was 50.5% male and 49.5% female.