Jake Bidwell, Jordan Cousins, Pawel Wszolek and Joel Lynch are leaving QPR after being told the club will not be taking up options to extend their contracts.
Of Rangers’ other out-of contract players, Angel Rangel has been offered a new deal, as has goalkeeper Seny Dieng, while Alex Baptiste’s departure has been confirmed.
Veteran defender Rangel, 36, joined the club on a short-term deal last August before being retained for the rest of the season.
Defenders Bidwell and Lynch and midfielder Cousins were signed in the summer of 2016 from Brentford, Huddersfield and Charlton respectively.
Polish winger Wszolek was brought in on loan from Italian side Hellas Verona that summer and signed on a permanent deal the following January.