Marlboro County is bounded as follows: on the west by the Great Pee Dee River, which separates it from the counties of Chesterfield, Darlington and Florence; and on the southeast by Dillon County, from which it is divided by a line drawn from a dead pine on the North Carolina line S. 22.5° W. 24.75 miles until it intersects the Great Pee Dee River.

HISTORY: 1962 Code SECTION 14-84; 1952 Code SECTION 14-84; 1942 Code SECTION 3009; 1932 Code SECTION 3009; Civ. C. '22 SECTION 701; Civ. C. '12 SECTION 619; Civ. C. '02 SECTION 558; G. S. 427; R. S. 486; (4) 662; (7) 199, 284.