"Due to a back ailment, Loretta Lynn's physician has ordered her off the road. All of her June concert dates have been postponed. More information to come regarding rescheduling," said a posting on the Web site.
Lynn, 69, had been set to perform in Michigan, Ohio, Indiana, Missouri, Alabama, Louisiana and Mississippi.
A performance at the Loretta Lynn Ranch in Hurricane Mills, Tenn., is scheduled for July 3.