| Province: | MB |
| Type: | MB 1972 |
| Route: | 28 |
| Length Km: | 10.2 |
| Length Round: | 2 |
| Direction A: | South |
| Terminus A: | (Canada–United States border) south of Cartwright |
| Direction B: | North |
| Terminus B: | at Cartwright |
| Established: | 1959 |
| Decommissioned: | 1980 |
| Previous Type: | Hwy |
| Previous Route: | 27 |
| Next Type: | Hwy |
| Next Route: | 30 |
Provincial Trunk Highway 28 (PTH 28) was a short provincial highway in the Canadian province of Manitoba.
The highway was used as a connector to PTH 3 and PR 258 at Cartwright and the U.S. border, where it continued as SR 69 in North Dakota (later redesignated as SR 4 in 1997).
PTH 28 first appeared on the 1959 Manitoba Highway Map.[1] Along with PR 258, PTH 28 was decommissioned in its entirety when PTH 5 was extended from Neepawa to its current southern terminus in 1980.[2]
The original PTH 28 was designated from PTH 1 north of Griswold to PTH 4 in Shoal Lake. This became part of PTH 21 in 1949.