蘭開斯特縣 (南卡羅萊納州)

{{Infobox U.S. county
| state = South Carolina
| county = Lancaster County
| county_zh = 蘭開斯特縣
| seal =
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| founded = 1798
| named for =
| seat = 兰开斯特
| largest city =
| largest city wl =
| area_total_km2 =
| area_total_sq_mi = 555
| area_land_km2 =
| area_land_sq_mi = 549
| area_water_km2 =
| area_water_sq_mi = 6
| area percentage = 1.13%
| census yr = 2000
| census estimate yr =
| pop = 61351
| population_density_km2 = 43
| population_density_sq_mi =
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| web = www.lancastercountysc.net
| coordinates = {{coord|{}|0|N|{}|0|W|type:adm2nd|display=title,inline}}
}}
蘭開斯特縣（）是美國南卡羅萊納州北部的一個縣，北鄰北卡羅萊納州。成立於1785年。面積1,438平方公里。根據美國2000年人口普查，共有人口61,351。縣治蘭開斯特。縣名來自賓夕法尼亞州同名的縣。