| Country: | TWN |
| Type: | PH |
| Route: | 2 |
| Alternate Name: | Northern Coastal Highway |
| Length Km: | 167.674 |
| Length Round: | 1 |
| Established: | 1962 |
| Direction A: | West |
| Terminus A: | in Tamsui District, New Taipei City |
| Junction: | in Keelung |
| Direction B: | East |
| Terminus B: | in Su'ao, Yilan County |
| Previous Type: | PH |
| Previous Route: | 1 |
| Next Type: | PH |
| Next Route: | 3 |
Provincial Highway No. 2 (台2線) is an east-west, 167.674 km-long provincial Taiwanese highway that starts from the border of Taipei and Tamsui and ends in Su'ao, Yilan. Although designed as an east-west route, the highway actually goes in north-south direction in Yilan County and parts of New Taipei City. The highway serves as the primary road for the north coast cities in Taiwan.
The entire highway is known as The Northern Coastal Highway (北部濱海公路) or simply Coastal Highway (濱海公路) to the locals, although various names are given for specific stretches of the road. The stretch from Tamsui to Jinshan is also known as Tamsui-Jinshan highway (淡金公路), while the stretch from Jinshan to Keelung City is known as Keelung-Jinshan highway (基金公路).
The highway begins at Guandu Bridge (關渡大橋), which is also the terminus of PH 2b and PH 15. It bypasses through downtown Tamsui and continues along the northern coasts of Taiwan, passing through Sanzhi, Jinshan, and Wanli. The road goes to the tourist destination of Baisha Bay, Yehliu, and Yehliu Promontory before entering Keelung City. In Keelung, the road goes through the downtown area as well as Port of Keelung before leaving for the northeastern New Taipei City. The highway continues along the coast, passing through Ruifang and Gongliao in New Taipei City. This stretch of the highway provides one of the most scenic views along the road. The scenic spots along the road include Cape Fugui (Taiwan's northernmost point), Cape Bitou (鼻頭角), Cape San Diego Lighthouse (三貂角燈塔), Fulong Beach (福隆海水浴場), Dragon Cave (龍洞), among others. The road continues on to Yilan County.
The road mostly follows a north-south direction along the coast in the county. It passes through rural and suburban townships of Toucheng, Zhuangwei, Wujie before ending at PH 9 in Su'ao. The road is one of the main highways connecting Keelung and Taipei with Yilan.
The highway has 7 spur routes. Each route use the same number, followed by a heavenly stem character. In English, these characters are replaced by letters in alphabetical order.