| Country: | JPN |
| Type: | National |
| Route: | 172 |
| Map Custom: | yes |
| Length Km: | 8.0 |
| Length Ref: | [1] |
| Established: | 18 May 1953 |
| Direction A: | West |
| Terminus A: | Port of Osaka, Minato-ku, Osaka |
| Direction B: | East |
| Terminus B: | in Chūō-ku, Osaka |
| Previous Type: | Route |
| Previous Route: | 171 |
| Next Type: | Route |
| Next Route: | 173 |
National Route 172 is a national highway of Japan connecting Minato-ku, Osaka and Chūō-ku, Osaka in Japan, with a total length of 8 km (4.97 mi).