Lanexa is an unincorporated community partially in New Kent County, and partially in James City County, Virginia, United States. The ZIP Code for Lanexa is 23089. Lanexa is located by the Chickahominy River and has many tourism sites for camping and outdoor activities. Diascund Creek runs immediately to the east of the center of Lanexa. A dam creates the Diascund Creek Reservoir on the north side of the community.