Peter Williams (22 April 1884 – 30 August 1976) was a rugby union player who represented New Zealand nine times, including a single Test match. He played club rugby for Dunedin side Alhambra, and played provincial rugby for Otago between 1908 and 1914. His sole season of international rugby was 1913, when he played in a home Test against Australia before touring North America with the All Blacks – as New Zealand's international team is known – that same year. He was selected for a tour of Australia the following year, but was unavailable and so did not play.