Mail delivery had been taking place on Sundays instead of Saturdays for religious reasons. Loma Linda has a large Seventh-Day Adventist population, and Saturday is their Sabbath.
The U.S. Postal Service said it is trying to save the extra money it has to pay carriers to deliver on Sundays.
The 15 mail carriers serving Loma Linda's 8,000 homes will make their final Sunday delivery April 17.
Saturday delivery starts April 23.