A county seat was laid out in 1786 at Fergus' Cross Roads, where several roads converged near the geographic center of the county. The new town was first known as the village of York, or more commonly York Court House. In 1841, the town was incorporated as "Yorkville." In 1823 its population (as recorded by local architect, Robert Mills), was 441—which included 292 whites and 149 blacks. By 1840 the population had reached 600, and in 1850 Yorkville consisted of 93 dwellings and 617 inhabitants. In the years just prior to the Civil War, the town gained a reputation as a summer resort for many Lowcountry planters trying to escape the malarial swamps of the region for the more moderate climate to be found in the Upstate. By 1860, the population of the town had topped 1,300—an increase of more than 125% in only one decade. During the Civil War, the town became a focal point for residents from the Lowcountry as a refugee destination during Union occupation of their towns.