Old Monroe is a city in Lincoln County, Missouri, United States. The population was 249 at the 2020 census.
History
Old Monroe was the site of Fort Howard. It was laid out in 1819, and named after President James Monroe. The name was prefixed with "Old" in order to avoid postal conflict with Monroe City.
The Battle of the Sink Hole was fought on May 24, 1815, after the official end of the War of 1812, between Missouri Rangers and Sauk Indians led by Black Hawk. The Sauk were unaware, or did not care, that their British patrons had signed the Treaty of Ghent with the U.S. The battle was fought in a low spot near the mouth of the Cuivre River near the current day city of Old Monroe.
After the battle, in 1816, Black Hawk reaffirmed the Treaty of St. Louis after re-negotiation with the United States government.
The city was originally named "Monroe" and it served as the county seat from 1819 until 1823. The name would change to its current form circa 1857 when Monroe County and its county seat, Monroe City, were established. The postal office then labeled the older town as Old Monroe.
Geography
Old Monroe is located at (38.931993, -90.748049).
According to the United States Census Bureau, the city has a total area of , of which is land and is water.
Demographics
2010 census
As of the census of 2010, there were 265 people, 102 households, and 68 families living in the city. The population density was . There were 113 housing units at an average density of . The racial makeup of the city was 97.0% White, 0.4% African American, 0.4% Native American, 1.1% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 1.9% of the population.
There were 102 households, of which 37.3% had children under the age of 18 living with them, 46.1% were married couples living together, 13.7% had a female householder with no husband present, 6.9% had a male householder with no wife present, and 33.3% were non-families. 27.5% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.13.
The median age in the city was 31.8 years. 28.3% of residents were under the age of 18; 10.9% were between the ages of 18 and 24; 29.4% were from 25 to 44; 23.1% were from 45 to 64; and 8.3% were 65 years of age or older. The gender makeup of the city was 48.7% male and 51.3% female.
2000 census
As of the census