| Walt Hackett | |
| Birth Place: | Tuscola, Illinois, U.S. |
| Death Date: | (aged 47) |
| Death Place: | Long Beach, California, U.S. |
| Player Years1: | c. 1949 |
| Player Team1: | Whittier |
| Player Positions: | Tackle |
| Coach Years1: | 1956 |
| Coach Team1: | Bellflower HS (CA) |
| Coach Years2: | 1957–1958 |
| Coach Team2: | Cerritos (assistant) |
| Coach Years3: | 1959–1961 |
| Coach Team3: | Baylor (assistant) |
| Coach Years4: | 1962–1966 |
| Coach Team4: | San Diego Chargers (DL) |
| Coach Years5: | 1968 |
| Coach Team5: | UC San Diego |
| Coach Years6: | 1969–1970 |
| Coach Team6: | Pittsburgh Steelers (DL) |
Walter W. Hackett (– April 24, 1971) was an American football coach. He served as the defensive line coach for the San Diego Chargers of the American Football League (AFL) from 1962 to 1966 and the Pittsburgh Steelers of the National Football League (NFL) from 1969 to 1970.[1] Hackett was the head football coach at the University of California, San Diego during that school's lone season with a football program, in 1968.[2]
Hackett attended Ramona High School in Ramona, San Diego County, California, where he played high school football. He played four years of college football at Whittier College in Whittier, California under head coach Wallace Newman.[3] Hackett died at the age of 47, on April 24, 1971, in Long Beach, California, after collapsing as he prepared to scout the Long Beach State football team.[4]