William Alexander McCaw (born 26 August 1927) is a former New Zealand international rugby union player.

[1] McCaw was born in Gore and educated at St. Kevin's College, Oamaru where he played rugby for the school.

[2] McCaw played for the Marist club and represented Southland from 1949 until 1955.

He played for the South Island Team in the years 1950–54 and was a New Zealand trialist in 1950, 1951 and 1953 and 1957.

[1] With the death of Roy Roper in 2023, McCaw became the oldest living All Black.