Bradford trio Garry Thompson, Matthew Bates and Louie Swain will leave the club when their contracts expire in the summer.
Thompson, a 2012 signing from Scunthorpe, made more than 100 appearances during his stay at Valley Parade during which time he made starts in the 2013 Capital One Cup Final and the League Two play-off last season, scoring 11 goals over a period of two years.
Former Middlesbrough defender Bates has spent less than a full season with the Bantams, featuring 22 times, while Swain failed to make an impact on Phil Parkinson's side having signed a professional contract last summer.
Parkinson told the club's official website: "I would really like to thank Thommo (Garry Thompson) for his significant contribution over the two years he has been here at the club.
"I am sure there will be no shortage of clubs interested in his services.
"I'd also like to thank Batesy (Matthew Bates) for his professionalism and hard work throughout the season.
"With regards to Louie, I've spoken to him and I just feel he needs to find a club more suited to his level so that he can benefit from getting regular games under his belt."