| Country: | TWN |
| Type: | PH |
| Route: | 72 |
| Established: | January 2001 |
| Alternate Name: | 東西向快速公路後龍汶水線 (East-West Expressway, Houlong-Wenshui Line) |
| Length Km: | 28.6 |
| Map: | Taiwan_PHY_72_map.png |
| Direction A: | West |
| Terminus A: | in Houlong, Miaoli |
| Direction B: | East |
| Terminus B: | in Shitan, Miaoli |
| Previous Type: | PH |
| Previous Route: | 68 |
| Next Type: | PH |
| Next Route: | 74 |
Provincial Highway 72 is an expressway, which begins in Houlong, Miaoli on Guanghua Road (Provincial Highway No. 1) and ends in Shitan, Miaoli on the Provincial Highway No. 3.
The total length is 28 km (17.4 mi).