Russian pyramid, also known as Russian billiards (Russian: ру́сский билья́рд, russky bilyard), is a form of billiards played on a large billiard table with narrow pockets. It is played across Russia and several former Soviet/Eastern Bloc countries. In the West, the game is known as pyramid billiards, or simply pyramid.

There are several rule variations of Russian pyramid. All games begin with fifteen numbered white balls racked in a pyramid pack, as in straight pool and eight-ball. Players may pocket any object balls on the table regardless of number, and the first player to pocket eight or more balls wins the frame. In addition, shots do not have to be called. Depending on the game variant, some specific balls may have to be in specific positions within the rack. The first player firmly breaks the rack with the cue ball from just in front of the baulk line. The most common varieties are the following, each of which has slight local variations on the rules:

Colored numbered balls for playing eight-ball, nine-ball, and other pool games on Russian billiards tables are also produced. The balls are 68 mm (2+11⁄16 in) in diameter, like the standard ones for Russian pyramid, and thus much larger than the American-style balls they are patterned after .

Sanctioned by the World Pool-Billiard Association (WPA).