List of Russian steam locomotive classes

This List of Russian steam locomotive classes includes those built both before and during the Soviet era.

They are to the gauge of 5 ft (1,524 mm) unless otherwise stated.

Some locomotives originally used in Poland during the period of the Russian Empire were built to 4 ft 8+1⁄2 in (1,435 mm) standard gauge and later converted to 5 ft gauge.

Class letters are shown in Cyrillic characters, followed by romanized characters in the next column.

The main source for this list is Le Fleming and Price's Russian Steam Locomotives.