Balkline, balk line, balk-line or baulk line may refer to:
- Balkline billiards, a popular form of carom billiards game
- Balkline, any of a series of lines drawn on a balkline billiards table defining areas in which only a set number of points may be scored before at least one ball must leave the area
- Baulk line, a line drawn across a table for snooker, English billiards or British-style pool, defining the baulk area, from which a shot must be taken under certain circumstances (which vary depending on the game type)