The Harlingen–Nieuweschans railway is a railway line in the Netherlands running from the port of Harlingen to Bad Nieuweschans, passing through Leeuwarden and Groningen. The line was opened between 1863 and 1868. It is also known as the Staatslijn "B". At Bad Nieuweschans, a connection with the German railway network is provided through the Ihrhove–Nieuweschans railway.

Harlingen is a municipality and a city in the northern Netherlands, in the province of Friesland.