La Grange, the seat of Oldham county, is located in the eastern part of the county near the junction of I-71 and KY 53. It was founded in 1827 at the crossing of the Shelbyville-Westport road and the Louisville-New Castle road and named for the home of General Lafayette. La Grange was established to be the county seat, which had been located at Westport. It was moved to La Grange in 1827, back to Westport in 1828, and back to La Grange again in 1838. The La Grange post office opened in 1828. The population in 1990 was 3,853.