The Cork, Blackrock and Passage Railway (CB&PR) was a 3 ft narrow gauge railway in County Cork, Ireland. The line originally opened in 1850 as a 5 ft 3 in Irish standard gauge railway between Cork and Passage West and operated steam feeder ferries to other locations round Cork Harbour. The company was heavily dependent on summer tourist traffic for a considerable proportion of its revenue. The railway was converted to 3 ft narrow gauge in 1900 in conjunction with extensions southwards to Crosshaven which were completed in 1904. The railway closed in 1932 and has since been replaced by a public pathway and nature area.

The Cork and Youghal Railway (C&YR) was a company that built and operated a short 27 miles (43 km) railway built in the early 1860s in Ireland linking Cork with Youghal, a small resort with harbour at the mouth of the Munster Blackwater. There was an additional 6-mile (9.7 km) branch to Cobh (Queenstown), a deepwater port in Cork Harbour associated with transatlantic liners. The railway was forced into administration within a few short years due to the bankruptcy of major shareholder David Leopold Lewis and was taken over by the much larger Great Southern and Western Railway (GS&WR). The branch to Cobh became the main line and by the late 1980s was the only part of the previously extensive rail network around Cork City to remain operational apart from the main line to Dublin. 2009 saw the Midleton branch re-open to Cork while the remainder of the route is being converted to a greenway in the 2020s.