Alexandru Manta (born 7 June 1977 in Bucharest) is a Romanian former rugby union footballer.
Manta spent the majority of his career in France, playing for USC Terrasson (1998), Stade Aurillacois (1998/02), Bègles-Bordeaux (2002/03), Section Paloise (2003/06), Castres Olympique (2006/07), CA Brive (2007/09), Lyon OU (2009/13), La Voulte-Valence (2013/15) and CS Vienne (2015/16).
Manta made his debut for Romania in 1996 against Belgium, in an 83–5 win. He played three matches at the 2007 Rugby World Cup, scoring a try against Italy (18–24).