The phrase "whole parish" refers to the entirety or all of the people living in a specific area or district, usually relating to a church community or local neighborhood. Full definition
Today, two 12 year old kids with that rifle would have it confiscated and their Dads would be in jail for «reckless endangerment» of their boys and the whole parish. (reason.com)
They mourn the closing of Catholic churches and schools — never mind that whole parishes, claiming the rights of individual conscience, have contracepted themselves out of existence. (firstthings.com)
This is not difficult: a few sessions can start a whole parish singing a simple Kyrie, Sanctus and Agnus Dei. (faith.org.uk)