Jack Umaga (born 18 June 1984) is a New Zealand-born Romanian rugby union football player.

He plays in the wing or centre positions for amateur Liga Națională de Rugby club Știința Petroșani.

[1][2] He also played for Romania's national team, the Oaks, making his international debut at the 2016 World Rugby Nations Cup in a match against the Welwitschias.

[3] Jack Umaga played for Sydenhan Rugby, Canterbury B, Mid-Canterbury, Tasman Makos and most recently for Hino Motors.

He was also selected 17 times to play for the Romanian National Team.