Aaron Nigel Armstrong (born 14 October 1977) is a track and field sprint athlete who competes internationally for Trinidad and Tobago.

He helped his country retain the relay title at the 2008 Central American and Caribbean Championships, but he lost his place in the individual events to his national rivals Emmanuel Callender and Rondel Sorrillo (who won gold and silver).

[1] He ran in the 200 metres at the 2009 World Championships in Athletics in Berlin, but he was eliminated in the first heats stage (although his time of 21.38 was a season's best).

[2] He took the bronze medal at the 2010 Commonwealth Games, finishing behind Lerone Clarke and Mark Lewis-Francis.

As of 14 November 2024, Armstrong holds the 200 metres track record for Meridian where on 3 April 1998 he clocked a time of 20.32 seconds with a following wind of 2.6 m/s.