Apartments For Rent Mount Vernon Ohio Knox County News . A cheap apartment in mount vernon, knox county, oh offers little storage space and fewer amenities compared to other apartments. Building for rent mount vernon city limits. 1407 Culbertson Dr, Mount Vernon, OH 43050 Trulia from www.trulia.com 1 bedroom apartment in fredericktown, no pets, no smoking, separate entrance,. Fits 2 cars and work shop area. Farm for rent, mount vernon city limits, large 100 year old barn on 15 acres of fertile cleared land.