County Road 542 (Norwegian: Fylkesvei 542) is a 19.7 kilometers (12.2 mi) long county road in Vestland county, Norway.

It connects the islands of Bømlo to the island of Føyno in Stord via part of the Triangle Link.

Before 1 January 2010, the route was a Norwegian national road, known as National Road 542 (Riksvei 542).

It was redesignated a county road after the regional reform of national roads.

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