John J. Dietzen is a retired Catholic pastor whose four-decade career has included pastoral ministry, marriage and family education, and journalism. His weekly question and answer column is syndicated nationally in nearly 40 Catholic newspapers. He also writes a weekly column for the Peoria Journal-Star.

Dietzen teaches philosophy and conducts parish missions and retreats for men, women, and couples and serves as episcopal vicar for retired priests in his diocese. He lives in Peoria, Illinois.