Geography Prospect is located in northeastern Jefferson County. A small portion of the city extends north into Oldham County. The city is bordered by the Ohio River to the northwest, by U.S. Route 42 to the southwest, and by Harrods Creek, a tributary of the Ohio, to the south. US-42 is the primary transportation artery running through the area, leading southwest to downtown Louisville and northeast to Bedford. According to the United States Census Bureau, Prospect has a total area of , of which are land and , or 1.85%, are water.
geography prospect is located in northeastern jefferson county a small portion of the city extends north into oldham county the city is bordered by the ohio river to the northwest by us route 42 to the southwest and by harrods creek a tributary of the ohio to the south us-42 is the primary transportation artery running through the area leading southwest to downtown louisville and northeast to bedford according to the united states census bureau prospect has a total area of  of which are land and  or 185% are water