The new deal, worth an estimated US$100,000 annually, sees the UK-based insurer deepen their relationship with Oxford, having previously advertised with the club.
Bridle Insurance's new sponsorship was signed before Oxford secured promotion to the Football league. It replaces former sponsor Buildbase's ten-year arrangement with the club.
"Firstly we would all like to acknowledge the marvelous support the club has received from Buildbase over the past ten years and as the club's new sponsor we are delighted for Buildbase that they were able to finish on such a high with the Wembley win and a return to the Football League," said Bridle chief operations officer, Neil Fox.
"Looking forward, we were very pleased to hear from Kelvin as it was an easy decision to increase our involvement with the club. Oxford United is a massive part of the community and is a well run, professional family club that we are all very proud and excited to be associated with. We are very keen to play as large a part as possible in helping Oxford climb up the Football League," Fox added.
Oxford United chairman, Kelvin Thomas, said, "We're very excited to have Bridle joining us as our main sponsors and are looking forward to starting next season back in the Football League with their support. I'm very much looking forward to developing our relationship further and I'm certain that this partnership will be a long and fruitful one."
Oxford finished third in the 2009/10 Football Conference season securing promotion with a 3-1 victory over York City in the Conference National play-off Final.