SC Code § 4-3-100 (2021)
2021 South Carolina Code of Laws|Title 4 - Counties|Chapter 3 - Boundaries Of Existing Counties|Section 4-3-100. Charleston County.

 Charleston County is bounded as follows: by a line originating at a point at latitude 32° 30' 57.711" N, longitude 80° 16' 35.854" W (North American Datum 1983) at the mouth of Jeremy Inlet; thence westward from said point following the center lines of Scott Creek and Big Bay Creek; thence northwestward on a straight line extending the center line of Big Bay Creek to a point at latitude 32° 30' 00.676" N and longitude 80° 21' 09.844" W (North American Datum 1983) in the South Edisto River; thence northward from said point following the center lines of the South Edisto River and the Edisto River to the point where the Dorchester County line intersects the center line of the Edisto River; thence eastward following the Dorchester County line to the center line of Secondary State Highway 10-317 or 18-317 (Parker's Ferry Road); thence eastward following the center line of Secondary State Highway 10-317 or 18-317 (Parker's Ferry Road) to its intersection with the center line of Rantowles Creek; thence northward following the center line of Rantowles Creek to its intersection with the Dorchester County line; thence following said line to its intersection with the property of Charles H. P. Duell (Middleton Gardens); thence following the eastern boundary of the property of Charles H. P. Duell (Middleton Gardens) to the ordinary high-water line on the eastern bank of the Ashley River; thence following the ordinary high-water line on the eastern bank of said river to a point on the ordinary high-water line of the eastern bank of the Ashley River 472 ft. west of the point where Sawpit Creek enters the Ashley River; thence from said point on a true bearing of N 22° 38' 39" E along a ditch on the eastern boundary of Archdale Hall subdivision and onward for a total distance of 248.61 chains to a concrete monument marked "CHAS/DOR"; thence on a true bearing of N 42° 15' 31" W to a point of intersection with the property line of Monroe E. and Winifred J. Hartzog; thence northeastward 800 ft. following the property line of Monroe E. and Winifred Hartzog to a point of intersection with the property line of James C. and Mary Palmer; thence southeastward following the property line of James C. and Mary Palmer for 406 ft. ± thence northeastward to a point on the north side of Secondary State Highway S10-1120 (Jamison Road); thence eastward following the northern boundary of Secondary State Highway S10-1120 (Jamison Road) to its intersection with the northwestern boundary of Secondary State Highway S10-76 (Ladson Road); thence following the northwestern boundary of Secondary State Highway S10-76 (Ladson Road) to the intersection of the northwestern boundary of Secondary State Highway S10-76 (Ladson Road) and the southwestern boundary of Secondary State Highway S10-881 (Lincolnville Road); thence northwestward, a distance of 9,700 ft. ± following the southwestern boundary of Secondary State Highway S10-881 (Lincolnville Road) to a point; thence southwestward 5,400 ft. ± to a point; thence northwestward 550 ft. ± to a point; thence southwestward 600 ft. ± to a point; thence northwestward on a true bearing of N 42° 15' 31" W to the center line of Sawmill Branch, 51.1 chains southwest of the southwestern right-of-way line of the Norfolk Southern Corporation (measured in a straight line); thence from this point following the center line of Sawmill Branch to its intersection with the southeastern right-of-way line of Richardson Avenue; thence from this point southeastward along the southeastern right-of-way of Richardson Avenue to its intersection with Owens Road; thence northeastward following the eastern boundaries of Challedon and Meadowbrook subdivisions to a point on the north side of East Third Street North; thence northwestward a distance of 1,200 ft. ± to a point; thence northeastward to a point on the north side of U.S. Highway 78 (5th North); thence southeastward following the northern boundary of U.S. Highway 78 (5th North) to a point; thence southwestward a distance of 325 ft. ± to a point; thence southeastward a distance of 379 ft. ± to a point; thence northeastward a distance of 325 ft. ± to a point on the north side of U.S. Highway 78 (5th North); thence a distance of approximately 760 ft. ± to a point; thence northeastward a distance of 1,500 ft. ± following the property line of the real estate of John Finucan and Maggie F. Peters to a point at which the northeastern corner of Dorchester County intersects with Berkeley and Charleston counties; thence S 50° 20' E to intersection with the eastern right-of-way line of U.S. Highway 78, a distance of 83.9 chains; thence southeastward following the southeastern right-of-way line of U.S. Highway 78 to its intersection with the southern right-of-way line of the S.C. Highway S10-76 (Ladson Road), a distance of 259.1 chains; thence eastward following the southern right-of-way line of S.C. Highway S10-76 (Ladson Road) to its intersection with the eastern boundary of the Elms Tract, now owned by the Goose Creek Land Company; thence southward following the eastern boundary of said tract to its intersection with the center line of Goose Creek; thence eastward following the center line of Goose Creek to its intersection with the western right-of-way line of the CSX Corporation; thence southward following said western right-of-way line to its intersection with the southern right-of-way line of Secondary State Highway S-8-13 (Remount Road); thence eastward by a straight line to its intersection with the center line of Goose Creek at its mouth; thence following a line with a true azimuth of 147° (bearing of S 33° E) to the center line of the Cooper River; thence southward following the center line of the Cooper River to its intersection with the center line of the Wando River as shown on the National Oceanic and Atmospheric Administration, National Ocean Survey chart 11524, 38th edition, dated March 23, 1991; thence northeastward following the center line of the Wando River to its intersection with the center line of Guerin's Creek; thence northeastward following the center line of Guerin's Creek to its intersection with the center line of Secondary State Highway 98 (Guerin Bridge Road); thence northward following the center line of Secondary State Highway 98 (Guerin Bridge Road) to its intersection with the center line of the old Halfway Creek Road; thence northeastward following the center line of the old Halfway Creek Road to its intersection with the center line of Lincoln Road; thence southward following the center line of Lincoln Road to its intersection with the center line of Wambaw Creek; thence eastward following the center line of Wambaw Creek to its intersection with the center line of the South Santee River; thence southeastward following the center line of the South Santee River to a point at latitude 33° 06' 59.743" N, longitude 79° 16' 50.003" W (North American Datum 1983) in the South Santee River; thence southwestward on a straight line to a point at latitude 33° 05' 55.943" N, longitude 79° 17' 42.847" W (North American Datum 1983); thence southeastward on a true azimuth of 145° (bearing of S 35° E) to the Territorial Sea boundary; thence southwestward following the Territorial Sea boundary to its intersection with a line having a true azimuth of 145° (bearing of S 35° E) extending from a point at 32° 30' 57.711" N, longitude 80° 16' 35.854" W (North American Datum 1983) at the mouth of Jeremy Inlet; thence northwestward on said line from the Territorial Sea boundary to said point at the mouth of Jeremy Inlet, the point of origin.  HISTORY: 1962 Code Section 14-60; 1952 Code Section 14-60; 1942 Code Section 2985; 1932 Code Section 2985; Civ. C. '22 Section 677; Civ. C. '12 Section 596; Civ. C. '02 Section 537; G. S. 410; R. S. 468; 1893 (21) 561; 1896 (22) 310; 1921 (32) 184; 1931 (37) 552; 1953 (48) 211; 1982 Act No. 407, Section 1; 1992 Act No. 302, Section 3, eff April 8, 1992.  Effect of Amendment  The 1992 amendment respecified the boundaries of Charleston County.