Coghlan, also a monthly winner in 2011, captained Ireland to their most successful Six Nations campaign yet last spring.
The girls in green comfortably beat Wales, Italy and Scotland, and only lost by a point away to France before going down to reigning champions England in their Triple Crown match.
The Ireland rugby captain was among 12 sports stars nominated for the 2012 Sportswoman of the Year title, which was won by Olympic gold medal boxer Katie Taylor.
One of Ireland's most renowned and respected Irish Olympic athletes, Maeve Kyle, was also awarded with a lifetime achievement award for her valued contribution to the world of athletics.
2012 IRISH TIMES/IRISH SPORTS COUNCIL SPORTSWOMAN OF THE YEAR -
Overall Winner: Katie Taylor
December 2011 - Fionnuala Britton (Athletics)
January 2012 - Jessica Kürten (Equestrian)
February - Fiona Coghlan (Rugby)
March - Audrey O'Flynn (Hockey)
April - Katie Walsh (Horse Racing)
May - Katie Taylor (Boxing)
June - Stephanie Meadow (Golf)
July - Annalise Murphy (Sailing)
August - Bethany Firth (Swimming)
September - Ursula Jacob (Camogie)
October - Rena Buckley (Gaelic Football)
November - Sycerika McMahon (Swimming)
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