| South Grade School Building | |
| Location: | 565 S. Main St., Monticello, Indiana |
| Coordinates: | 40.7381°N -86.7611°W |
| Architect: | Welker, L.C. |
| Added: | September 12, 1985 |
| Area: | less than one acre |
| Refnum: | 85002136 |
South Grade School Building, also known as the Administration Building, Twin Lakes School Corporation, is a historic two-room school building located at Monticello, White County, Indiana. It was built in 1892, and is a -story, brick building with a gable on hip roof. It is seven bays wide and has a three bay wide central pedimented pavilion.[1]
It was listed on the National Register of Historic Places in 1985.