A billiard room (also billiards room, or more specifically pool room, snooker room) is a recreation room, such as in a house or recreation center, with a billiards, pool or snooker table. (The term is sometimes also used as synonymous with "billiard hall" i.e., a business providing public access to hourly-rental or coin-operated billiard tables.)

A one-table billiard room requires enough space around the table to accommodate the range of a stroke of the cue from all angles, while also accounting for chairs, the storage rack and any other furniture that is or will be present. Optimally, there should be at least 6 ft (1.8 m) of clearance between the table and any walls, furniture or other objects, on all sides and at all corners of the table. The table size is really a measure of the bed of the table, and does not include the rails which are typically around 6 inches (15 cm) wide. The typical cue is a bit shorter than 5 ft (1.5 m) long (snooker cues, however, are often longer), and many shots need 6 in. or more of forearm-swinging room, totaling around 6 ft (1.8 m) of space. Examples of optimum minimum free space dimensions for common table sizes, using this logic: