Jeffersonville ( /dfrsnvl/) is a city in Clark County, Indiana, along the Ohio River. Locally, the city is often referred to by the abbreviated name Jeff. It is directly across the Ohio River to the north of Louisville, Kentucky along I-65. The population was 44,953 at the 2010 census. The city is the county seat of Clark County. In 1813 and 1814 Jeffersonville was briefly the de facto capital of the Indiana Territory, as then-governor Thomas Posey disliked then-capital Corydon, and wanting to be closer to his personal physician in Louisville, decided to live in Jeffersonville. However, it is debated by some that Dennis Pennington had some involvement to his location to Jeffersonville. The territorial legislature remained in Corydon and communicated with Posey by messenger. Shortly after formation, Jeffersonville was named to be the county seat of Clark County in 1802, replacing Springville. In 1812 Charlestown was named the county seat, but the county seat returned to Jeffersonville in 1878, where it remains.