Olean is a town in northern Miller County, Missouri, United States. The population was 114 at the 2020 census. Attribution to Dr. W.S. Allee appear not to be true, as Allee never lived in or visited New York State.

At the turn of the 20th century, Olean contained a gristmill and a canning factory.

The railroad left the community in 1962; its station is now listed on the National Register of Historic Places.

Since 1993, the community has hosted an annual Testicle Festival featuring cooked testicles from various animals.

The festival wasn't held for several due to COVID-19 pandemic.

The Olean Railroad Depot was added to the National Register of Historic Places in 1993.

Geography

Olean is in northern Miller County, north-northeast of Eldon and southwest of Jefferson City, the state capital. According to the U.S. Census Bureau, Olean has an area of , all land.

2010 census

As of the census of 2010, there were 128 people, 57 households, and 29 families residing in the village. The population density was . There were 67 housing units at an average density of . The racial makeup of the village was 90.6% White, 5.5% African American, and 3.9% from two or more races. Hispanic or Latino of any race were 3.1% of the population.

There were 57 households, of which 28.1% had children under the age of 18 living with them, 33.3% were married couples living together, 15.8% had a female householder with no husband present, 1.8% had a male householder with no wife present, and 49.1% were non-families. 38.6% of all households were made up of individuals, and 5.3% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 3.10.

The median age in the village was 42.5 years. 21.1% of residents were under the age of 18; 8.6% were between the ages of 18 and 24; 25.9% were from 25 to 44; 35.9% were from 45 to 64; and 8.6% were 65 years of age or older. The gender makeup of the village was 53.1% male and 46.9% female.

2000 census

As of the census