The Alderney Railway on Alderney is the only railway in the Bailiwick of Guernsey, and the only working railway in the Channel Islands. The Alderney Railway opened in 1847 and runs for about 2 miles (3.2 km), mostly following a coastal route, from Braye Road to Mannez Quarry and Lighthouse.

Alderney is the northernmost of the inhabited Channel Islands. It is part of the Bailiwick of Guernsey, a British Crown dependency. It is 3 miles (5 km) long and 1+1⁄2 miles (2.4 km) wide.