警棍是一种棍型的警用武器，可攻击可防守。

警棍的种类多，可以是木或金属等所制，亦有拐种，此外，亦有部分警棍被改装至拥有更大的攻击力，包括装有火器、喷雾器、电击或催泪等等。

因为最常用于警察装备，所以名为警棍。在1960年代，美国警察甚至出现过双节棍，可是最后不获取用。

A baton or truncheon (also called a cosh, billystick, billy club, nightstick, sap, blackjack, stick) is a club of less than arm's length made of wood, rubber, plastic or metal. They are carried for forced compliance and self-defense by law-enforcement officers, correctional staff, security-industry employees and (less often) military personnel. Other uses for truncheons and batons include crowd control or the dispersal of belligerent or non-compliant people.