Aiga Grabuste (born 24 March 1988, in Rēzekne) is a Latvian track and field athlete competing in heptathlon. She represented her country at the 2008 Beijing Olympics and competed at the World Championships in Athletics in 2007 and 2009. She has set Latvian, Latvian U-23 and Latvian junior records in heptathlon.
Her current personal best performance is 6396 points, which she achieved at the 2009 European Athletics U23 Championships held in Kaunas, where she won the gold medal. Grabuste was also the 2007 European Junior champion in heptathlon.
In the indoor women's pentathlon, she was eighth at the 2010 IAAF World Indoor Championships and tenth at the 2011 European Athletics Indoor Championships. At the TNT - Fortuna Meeting in 2011 she set bests in the 200 metres, long jump and 800 metres events to take third overall with a score of 6252 points.
||World Junior Championships
||European Junior Championships
||European U23 Championships
||World Indoor Championships
||European Indoor Championships
||London, United Kingdom