| Country: | JPN |
| Type: | National |
| Route: | 156 |
| Map Custom: | yes |
| Length Km: | 213.3 |
| Length Ref: | [1] |
| Established: | 1953 |
| Direction A: | North |
| Terminus A: | in Takaoka, Toyama |
| Direction B: | South |
| Terminus B: | in Gifu |
| Previous Type: | Route |
| Previous Route: | 155 |
| Next Type: | Route |
| Next Route: | 157 |
National Route 156 is a national highway of Japan connecting Gifu and Takaoka, Toyama in Japan, with a total length of 213.3km (132.5miles).