Barlow said winning public vote felt 'amazing' as he picked up his award in London last night.
Barlow is expecting his fourth child with wife Dawn, and is already father to Daniel, 11, Emily, nine, and three-year-old Daisy.
41 year-old Barlow said: "I've been waiting for it for a long time. My kids are really excited and I don't think they can quite believe it. Being a dad is a really important part of my life and it means a lot to have won this award."
The Take That singer beat off stiff competition from last year's winner Peter Andre.
He shared the news with his fans on twitter, joking: "Ladies, gentlemen, lads, lassies and Peter Andre, I'm proud to tell you all that I've won 'Celebrity Dad of the year 2012' #GbArmyyourock"
The X Factor judge openly taunted two-time winner Peter, who is father to Junior, seven, and four-year-old Princess Tiaamii - on Twitter earlier this month in the run-up to the announcement, telling the Andre to "stand aside".
The Premier Inn Celebrity Dad of the Year 2012 award rewards the celebrity father who has impressed the nation the most by balancing a hectic public life with the demands of parenting.
Other famous faces who were in contention for the prize included soccer star David Beckham, celebrity chef Jamie Oliver and rapper Jay-Z.
