A
- Mikal Abdul-Saboor (1982)
- Walter Abercrombie (1982–1987)
- Ed Adamchik (1965)
- Bob Adams (1969–1971)
- Flozell Adams (2010)
- Mike Adams (1997)
- Nathaniel Adibi (2004)
- Ben Agajanian (1945)
- Dick Alban (1956–1959)
- Tom Alberghini (1945)
- Art Albrecht (1942)
- John Alderton (1953)
- Brent Alexander (2000–2003)
- Chuck Allen (1970–1971)
- Cortez Allen (2011)
- Duane Allen (1965)
- Jimmy Allen (1974–1977)
- Lou Allen (1950–1951)
- Marvin Allen (2006–2008)
- Will Allen (2010–2011)
- Don Alley (1969)
- John Allred (2002)
- Lyneal Alston (1987)
- David Ames (1960)
- Rudy Andabaker (1952–1954)
- Anthony Anderson (1979)
- Art Anderson (1963)
- Chet Anderson (1967)
- Fred Anderson (1978–1979)
- Gary Anderson (1982–1994)
- Jesse Anderson (1992)
- Ken Anderson (2007–2009)
- Larry Anderson (1978–1981)
- Matt Anderson (2002)
- Mel Anderson (1987)
- Ralph Anderson (1971–1972)
- Alan Andrews (1985)
- Steve Apke (1987)
- Bobby April (1994–1995)
- Mike Archer (1996–2002)
- Bruce Arians (2004–2011)
- Al Arndt (1935)
- Dick Arndt (1967–1970)
- David Arnold (1989)
- Jahine Arnold (1996–1998)
- Jay Arnold (1941)
- Corwin "Corrie" Artman (1933)
- Willie Asbury (1966–1968)
- Bert Askson (1970–1971)
- Dale Atkeson (1958)
- Frank Atkinson (1963)
- Steve August (1984)
- Gene Augusterfer (1935)
- Bill Austin (1951–1968)
- Ocie Austin (1970–1971)
- Steve Avery (1991–1995)
- Buddy Aydelette (1987)
Read more about this topic: List Of Pittsburgh Steelers Players