- Locomotives3
- Log cabins2
- Luncheons1
- Lutheran Theological Southern Seminary9
- Lutheran church buildings19
- Lyles, Bissett, Carlisle & Wolff5
- Machinery1
- Mailboxes1
- Main Street Methodist Church (Columbia, S.C.)2
- Market Restaurant (Columbia, S.C.)4
- Markets1
- Marmac Hotel (Columbia, S.C.)1
- Masonic Temple (Columbia, S.C.)1
- Maxcy, Jonathan, 1768-1820--Monuments2
- Maxey, Russell, 1906-19943
- McDonald's Corporation1
- McGregor Presbyterian Church (Columbia, S.C.)1
- McKissick Memorial Library4
- McMaster School (Columbia, S.C.)1
- Medical offices11