Kallum Mantack, Jamie Stott and Lee Knight have all signed their first professional contracts with the club.
Full back Mantack, central defender Stott and winger Knight have all signed one year contracts with an option for a second.
All three were part of a successful youth team who lifted the Youth Alliance Cup in their first year, and the Lancashire FA Professional Youth Cup last season.
With pre-season just around the corner, the trio were delighted to sign.
Mantack said: “It’s a big season for us all. We are all going to work hard and it’s about enjoying it along the way as well so I’m delighted.”
Stott added: “It’s a new season and we’ve all come through the ranks at Oldham Athletic so we’re looking to impress. It’s a big season for us and we all want to be in the team as much as we can and impress as much as we can as well.”
Knight said: “It’s a big step up now from the youth team so we’ve got to work harder, put everything into it and have no regrets.”
Squad numbers will be announced in due course.