Build a Directory

HomeBishopsDennis Oneil

A Visual Directory of the Hierarchy of the Catholic Church.

Currently featuring the bishops and dioceses of the United States.

Dedicated to Mary, Queen of Apostles and the Immaculate Conception.

Ora pro nobis!

Not affiliated with the USCCB, any (arch)diocese, or the Holy See.

Directory

Dioceses
Bishops
Build a Directory

About

About
Data Sources
Contact

Resources

Catholic-hierarchy.org
USCCB Directory

Website, code, and design are copyright © 2026 Hierarchy.Directory. All rights reserved. No ownership or copyright is claimed over images, portraits, or data. Learn more here.

DO

His Excellency

Most Rev. Dennis P. O'Neil

Born: January 16, 1940 · Fremont · Died aged 63
Ordained priest: April 30, 1966
Ordained bishop: March 27, 2001
Died: October 17, 2003
Rite: Latin

A priest for 37 years, 5 months

A bishop for 2 years, 6 months

catholic-hierarchy.org Wikipedia

Jan 1940

Born

January 16, 1940 · Fremont

Apr 1966

Ordained to the Priesthood

April 30, 1966

Jan 2001

Appointed Auxiliary Bishop of San Bernardino

January 16, 2001 · San Bernardino, California, United States

Mar 2001

Ordained Bishop

March 27, 2001

Most Rev. Gerald R. Barnes

Most Rev. Gabino Zavala

Most Rev. Stephen Blaire

Most Rev. Stephen Blaire

Oct 2003

Died

October 17, 2003