Jessamine County is a county located in the U.S. state of Kentucky. It is within the Inner Blue Grass region, which was the center of farming and blooded stock raising, including thoroughbred horses. It was formed in 1799. As of 2000, the population was 39,041. Its county seat is Nicholasville.
With regard to the sale of alcohol, it is classified as a moist county—a county in which alcohol sales are prohibited (a dry county), but containing a "wet" city, in this case Nicholasville, where package alcohol sales are allowed. A winery (Chrisman Mill Vineyards) is also authorized to operate and sell its product in the dry portion of the county.
As of the census of 2000, there were 39,041 people, 13,867 households, and 10,663 families residing in the county. The population density was 226 people per square mile (87/km²). There were 14,646 housing units at an average density of 85 per square mile (33/km²). The racial makeup of the county was 94.44% White, 3.13% Black or African American, 0.20% Native American, 0.58% Asian, 0.03% Pacific Islander, 0.47% from other races, and 1.14% from two or more races. 1.31% of the population were Hispanic or Latino of any race.
There were 13,867 households out of which 38.80% had children under the age of 18 living with them, 61.90% were married couples living together, 11.10% had a female householder with no husband present, and 23.10% were non-families. 18.50% of all households were made up of individuals and 6.50% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 3.05.
The age distribution was 26.40% under the age of 18, 11.60% from 18 to 24, 31.10% from 25 to 44, 21.40% from 45 to 64, and 9.50% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 96.60 males. For every 100 females age 18 and over, there were 92.80 males.
The median income for a household in the county was $40,096, and the median income for a family was $46,152. Males had a median income of $32,340 versus $23,771 for females. The per capita income for the county was $18,842. About 8.40% of families and 10.50% of the population were below the poverty line, including 13.70% of those under age 18 and 9.90% of those age 65 or over.
The Lexington Area MPO is responsible for transportation planning for Fayette and Jessamine Counties. This includes activities such as carpool matching, administering a commuter vanpool program, air quality forecasting, bicycle and pedestrian planning, congestion management, and developing transportation plans and documents.