Clayton Blackmore (born September 23, 1964 in Neath) was a Welsh football player.

Clayton came through the Manchester United youth system. He has the unique distingtion of having worn every number for United from 2 to 11. While with the club, he helped the club with the F.A. Cup on two occations (1985 and 1990) as well as the 1992 League Cup and the 1991 Cup Winners' Cup. He left the club for Middlesbrough in 1993 after scoring 25 goals.