| Country: | JPN |
| Type: | National |
| Route: | 124 |
| Map Custom: | yes |
| Length Km: | 88.1 |
| Length Ref: | [1] |
| Established: | 1953 |
| Direction A: | South |
| Terminus A: | / Prefectural Road 37 in Chōshi, Chiba |
| Direction B: | North |
| Terminus B: | in Mito, Ibaraki |
| Previous Type: | Route |
| Previous Route: | 123 |
| Next Type: | Route |
| Next Route: | 125 |
National Route 124 is a national highway of Japan connecting between Chōshi, Chiba and Mito, Ibaraki in Japan, with total length has 88.1 km (54.74 mi).