Oldham County Kentucky real estate South information is updated daily from the Louisville MLS and defined most easily as Area 21 in the MLS. Oldham County is northeast and adjacent to Jefferson County which contains Louisville Kentucky. The county is split in half by Interstate 71 and area 21 is south of this four lane national highway. This area contains some national ranked communities like PeWee Valley. Crestwood, Ballardsville and areas in between are also south of the interstate and offer unique homes from less than one hundred thousand dollars to multi-million dollar homes. Oldham County ranks highly in both wealth and education in the state of Kentucky. Several award winning public schools are also located in this area.