Dearborn is a city in Buchanan and Platte counties in the U.S. state of Missouri and is part of the Kansas City metropolitan area. The population was 496 at the 2010 census.
Dearborn is located in northern Platte County and centered about one-half mile south of the Platte-Buchanan county line. The Dearborn Reservoir is just across the county line to the north. The community is on Routes Z and Y one mile east of U.S. Route 71. Bee Creek flows past the west side of the community.
According to the United States Census Bureau, the city has a total area of 0.91 square miles (2.36 km), of which 0.89 square miles (2.31 km) is land and 0.02 square miles (0.05 km) is water.
The Platte County portion of Dearborn (the majority of the city) is part of the Kansas City, MO–KS Metropolitan Statistical Area, while the Buchanan County portion is part of the St. Joseph, MO–KS Metropolitan Statistical Area.
As of the census of 2010, there were 496 people, 234 households, and 120 families residing in the city. The population density was 557.3 inhabitants per square mile (215.2/km). There were 269 housing units at an average density of 302.2 per square mile (116.7/km). The racial makeup of the city was 96.4% White, 0.4% African American, 0.2% Native American, 1.2% from other races, and 1.8% from two or more races. Hispanic or Latino of any race were 2.6% of the population.
There were 234 households of which 26.9% had children under the age of 18 living with them, 41.0% were married couples living together, 8.1% had a female householder with no husband present, 2.1% had a male householder with no wife present, and 48.7% were non-families. 41.9% of all households were made up of individuals and 20% had someone living alone who was 65 years of age or older. The average household size was 2.12 and the average family size was 2.98.
The median age in the city was 38.7 years. 23.2% of residents were under the age of 18; 8% were between the ages of 18 and 24; 24.5% were from 25 to 44; 25.4% were from 45 to 64; and 19% were 65 years of age or older. The gender makeup of the city was 48.6% male and 51.4% female.
As of the census of 2000, there were 529 people, 230 households, and 134 families residing in the city. The population density was 615.9 people per square mile (237.5/km²). There were 258 housing units at an average density of 300.4 per square mile (115.8/km²). The racial makeup of the city was 96.22% White, 0.38% African American, 0.76% Native American, 0.19% Asian, 1.13% from other races, and 1.32% from two or more races. Hispanic or Latino of any race were 1.32% of the population.
There were 230 households out of which 30.0% had children under the age of 18 living with them, 43.5% were married couples living together, 8.7% had a female householder with no husband present, and 41.7% were non-families. 36.5% of all households were made up of individuals and 18.7% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 3.02.
In the city the population was spread out with 26.1% under the age of 18, 8.9% from 18 to 24, 25.9% from 25 to 44, 24.0% from 45 to 64, and 15.1% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 100.4 males. For every 100 females age 18 and over, there were 84.4 males.
The median income for a household in the city was $34,861, and the median income for a family was $47,727. Males had a median income of $34,500 versus $24,808 for females. The per capita income for the city was $17,537. About 4.3% of families and 11.4% of the population were below the poverty line, including 12.5% of those under age 18 and 18.8% of those age 65 or over.