The blonde boutique owner and reality star scooped the title in the icelolly.com contest over the likes of Katie Price, Frankie Bridge and Holly Willoughby.
Billie is mum to daughter Nelly, who turns one in July.
"It's been a really busy past couple of years with TOWIE, my other projects such as Jam Kidswear and my signature range products, and of course the birth of my beautiful daughter Nelly last summer," said Billie, clutching her prize.
"It's very much been a juggling act, with me trying to find the right balance between my career and family life, something I know all the real mums out there face and deserve huge credit for too - but I wouldn't change anything for the world!"
Billie sent her thanks to everyone who had voted for her.
The popular Essex star had revealed earlier this month how thrilled she was to even be nominated alongside fellow celeb mums like Katie Price, Katie Piper, Emma Willis and Abbey Clancy.
"Such amazing names have won in the past like Katie Price and with this being my first year as a mother it is really special that the public have voted enough for me to be shortlisted," she said.
"I have told Nelly that her mummy is now in a competition to win the Celebrity Mum Of The Year Award. I'm sure if she was old enough she would vote for me as well. At least I'm hoping she would!"
Billie and partner Greg Shepherd welcomed little Nelly last year, shortly after announcing their engagement.
Nelly has made a handful of appearances on TOWIE.
All you need to know about Billie Faiers in one minute!
It's the fourteenth year of the icelolly.com Celebrity Mum of the Year contest. The brand's chief marketing officer Ross Matthews said: "Billie makes no secret that becoming a mum last year is the best thing to have ever happened to her.
"She's often snapped while enjoying some playtime outside with Nelly, and it's clear that she's a wonderfully dedicated mother. She was up against some tough competition, but she's well worthy of the recognition the British public has given her."
Congrats to Billie!