| J. C. Duncan | |
| State House: | South Carolina |
| District: | 36th/Spartanburg County |
| Term Start: | 1969 |
| Term End: | 1972 |
| Term Start2: | 1975 |
| Term End2: | 1980 |
| Birth Date: | 27 June 1929 |
| Birth Place: | Lyman, South Carolina |
| Party: | Democratic |
| Occupation: | Farmer, realtor, preacher, politician, teacher |
| Alma Mater: | Wofford College |
Jason Charlie (J. C.) Duncan (born June 27, 1929) was an American politician in the state of South Carolina. He served in the South Carolina House of Representatives as a member of the Democratic Party from 1969 to 1972 and 1975 to 1980, representing Spartanburg County, South Carolina. He was a farmer, Methodist preacher, teacher, college professor and realtor.[1]