The 1973 Washington State Cougars football team was an American football team that represented Washington State University in the Pacific-8 Conference (Pac-8) during the 1973 NCAA Division I football season. In their sixth season under head coach Jim Sweeney, the Cougars compiled a 5–6 record (4–3 in Pac-8, fourth), and were outscored 290 to 250. The team's statistical leaders included Chuck Peck with 1,023 passing yards, Andrew Jones with 1,059 rushing yards, and Tim Krause with 384 receiving yards.