The Ryūgasaki Line (竜ヶ崎線, Ryūgasaki-sen) is a railway line operated by the Kantō Railway in Ibaraki Prefecture in Japan.

It is a non-electrified line which connects Sanuki, on the Jōban Line, to Ryūgasaki, with one intermediate station at Ireji.

The line was regauged to 1,067 mm (3 ft 6 in) in July 1915.

Freight services ceased in 1971, the same year the line switched to driver-only-operation (in August 1971), becoming the first driver-only-operation line in Japan.

This article about a Japanese railway line–related topic is a stub.