Harold Dudley Hay (31 December 1881 – 27 December 1955) was an Australian rules footballer who played for the Melbourne Football Club in the Victorian Football League (VFL).Hay became one of the club's first premiership players, playing in the 1900 VFL Grand Final, under the captaincy of Dick Wardill.
He made his debut against South Melbourne in Round 13 of the 1900 VFL season, at the Melbourne Cricket Ground.
Hay has been given the Melbourne Heritage Number of 82, based on the order of his debut for the club.