A&W may refer to:
- A&W Restaurants, an American restaurant chain
- A&W (Canada), a Canadian restaurant chain
- A&W Root Beer
- A&W Cream Soda
- Ahnapee and Western Railway
- Alexandria & Western Railway
A&W Canada was part of the U.S.-based A&W Restaurants chain, but was sold to Unilever in 1972, and then bought by its management in 1995. It no longer has any corporate connection to A&W operations outside of Canada.
The Canadian operation is owned and operated by the privately held A&W Food Services of Canada Inc., based in North Vancouver, British Columbia. In December 2013, A&W was Canada's second-largest Quick Service Restaurant burger chain with 850 outlets after McDonald's 1,400 outlets.