The WAGR B class was a class of 4-6-0T tank locomotives operated by the Western Australian Government Railways (WAGR) between 1884 and 1959.

The first two were ordered from Kitson & Co, Leeds in 1884 to work the steeply graded Eastern Railway from Guildford to Chidlow.

A further three were built by Dübs & Co, Glasgow in 1885/86 and a further six by Kitson & Co in 1898.

In 1903, they were displaced by the K class and relegated to shunting duties.

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