William Waddell (? - 1992) was a professional football (soccer) player and manager.

As a player, Waddell only played for boyhood heros Rangers F.C.. He made his debut at the tender age of 17 and went on to win four League titiles, two Scottish Cups and 17 caps for Scotland.

After such a fine playing career, after retiring in 1956 he set out to build the same reputation as a manager and took Kilmarnock F.C. to their only League Championship win to date in 1964-1965. After such success at Killie, he returned to Rangers, this time as manager, in 1969 following the sacking of David White. Despite not winning any League Championships he won the Scottish League Cup in 1970 ending a six year hoodoo without a trophy at a time in which Celtic F.C. dominated Scottish football.

His greatest achievement, however, was in 1972 when he lead Rangers to a Cup Winners' Cup win beating Dynamo Moscow 3-2 in the final in Barcelona. This was all the more impressive because of the fact that it came just one year after the Ibrox disaster where 66 Rangers fans lost their lifes. After the disaster Waddell vowed this never to happen again and spear-headed the building the Ibrox Stadium as it is today.

After the Cup Winners Cup win in 1972 he handed the reins to assistant Jock Wallace and went on to serve the club in Managing director, General manager and Vice chairman roles until his death in 1992.