"Fellow parishioners" refers to people who attend the same church or place of worship as you. They are the members of your religious community who share the same religious beliefs and participate in the same religious activities. Full definition
It was not unusual for the aging couple to visit the church during off - hours - sometimes he thought they preferred solitude to the company of fellow parishioners they believed corrupt with sin. (bookbrowse.com)
Most people feel more known and even cared for by co-workers than by fellow parishioners. (firstthings.com)
They are taught what the convalescent mental patient needs from his parish clergymen and fellow parishioners when he returns home from the hospital. (religion-online.org)