Over the past five years Sean Hayes has been nominated for (and won!) many awards.
Listed below are some of his fantastic achievements and a brief description of the institutions that gave each nomination or award.

Screen Actors Guild Awards

Sean has won 3 Screen Actors Guild Awards.
The last 2 awards were for the "Outstanding Performance by a Male Actor in a Comedy Series" for his portrayal of Jack McFarland in the sitcom Will & Grace.
Sean won the individual awards for 2 consecutive years (2002/2003) and has also been nominated each year since
Sean's first SAG Award in 2001 was for the ensemble cast of Will & Grace

Emmy Awards

In 2000 Sean won the Emmy Award in the "Outstanding Supporting Actor in a Comedy Series" category for his role on Will & Grace.
He has also picked up a further 4 Emmy nominations.

Golden Globes

Sean has been nominated four times for a Golden Globe Award.

Other Awards

Sean won an American Comedy Award in 2001 for Funniest Supporting Male Performer in a TV Series.
In addition Sean has won the Choice Sidekick - Teen Choice Awards 3 times (2000/2001/2004) and a TV Guide Award for Supporting Actor of the Year in a Comedy Series (2001).
Sean has also received the following nominations

2000	Q Award - Viewers for Quality Television Awards - Best Supporting Actor in a Quality Comedy Series TCA Award - Television Critics Association Awards - Individual Achievement in Comedy
2001 - 2005	Ensemble/Individual Screen Actors Guild Awards
2001/2003/2004	Golden Satellite Awards;
2001 - 2005	Golden Globe Awards
2001 - 2004	Emmy Awards
2000	American Comedy Award