 A small western portion of Orangeburg County was annexed in 1871 to the newly formed Aiken County during the Reconstruction era.In 1908 the northern portion of the County along the Congaree River was separated and included in the newly formed Calhoun County, with its seat at Saint Matthews.In 1910 a small western portion of Berkeley County, around Holly Hill and Eutawville, was annexed to Orangeburg County, thus bringing the county to its present size.