The Roman Catholic Church is the world's largest Christian Church, and its largest religious grouping.

Within the USA the hierarchy consists of:

• Archdiocese
  • Suffragan Diocese

• Anchorage
  • Fairbanks
  • Juneau

• Atlanta
  • Charleston
  • Charlotte
  • Raleigh
  • Savannah

• Baltimore - Honorary Primate of the United States
  • Arlington
  • Richmond
  • Wheeling-Charleston
  • Wilmington

• Boston
  • Burlington
  • Fall River
  • Manchester
  • Portland
  • Springfield, Massachusetts.
  • Worcester

• Chicago
  • Belleville
  • Joliet, Illinois
  • Peoria
  • Rockford
  • Springfield, Illinois

• Cincinnati,
  • Cleveland
  • Columbus
  • Steubenville
  • Toledo
  • Youngstown

• Denver
  • Cheyenne
  • Colorado Springs
  • Pueblo

• Detroit
  • Gaylord
  • Grand Rapids
  • Kalamazoo
  • Lansing
  • Marquette
  • Saginaw

• Dubuque
  • Davenport
  • Des Moines
  • Sioux City

• Hartford
  • Bridgeport
  • Norwich
  • Providence

• Indianapolis
  • Evansville
  • Fort Wayne - South Bend
  • Gary
  • Lafayette, Indiana

• Kansas City, Kansas
  • Dodge City
  • Salina
  • Wichita

• Los Angeles
  • Fresno
  • Monterey, California
  • Orange, California
  • San Bernardino
  • San Diego

• Louisville, Kentucky
  • Covington
  • Knoxville
  • Lexington
  • Memphis
  • Nashville
  • Owensboro

• Miami
  • Orlando
  • Palm Beach
  • Pensacola-Tallahassee
  • Saint Augustine
  • Saint Petersburg
  • Venice, Florida

• Milwaukee
  • Green Bay
  • La Crosse
  • Madison
  • Superior

• Mobile
  • Biloxi
  • Birmingham
  • Jackson

• Newark
  • Camden
  • Metuchen
  • Paterson
  • Trenton

• New Orleans
  • Alexandria
  • Baton Rouge
  • Houma-Thibodaux
  • Lafayette
  • Lake Charles
  • Shreveport

• New York
  • Albany
  • Brooklyn
  • Buffalo
  • Ogdensburg
  • Rochester
  • Rockville Centre
  • Syracuse

• Oklahoma City
  • Little Rock
  • Tulsa

• Omaha
  • Grand Island
  • Lincoln

• Philadelphia
  • Allentown
  • Altoona-Johnstown
  • Erie
  • Greensburg
  • Harrisburg
  • Pittsburgh
  • Scranton

• Portland, Oregon
  • Baker
  • Boise City
  • Great Falls-Billings
  • Helena

• Saint Louis
  • Jefferson City
  • Kansas City-Saint Joseph
  • Springfield-Cape Girardeau

• Saint Paul and Minneapolis
  • Bismarck
  • Crookston
  • Duluth
  • Fargo
  • New Ulm
  • Rapid City
  • Saint Cloud
  • Sioux Falls
  • Winona

• San Antonio
  • Amarillo
  • Austin, Texas
  • Beaumont
  • Brownsville
  • Corpus Christi
  • Dallas
  • El Paso
  • Fort Worth
  • Galveston-Houston
  • Laredo
  • Lubbock
  • San Angelo
  • Tyler
  • Victoria, Texas

• San Francisco
  • Honolulu
  • Las Vegas
  • Oakland
  • Reno
  • Sacramento
  • Salt Lake City
  • San Jose, California
  • Santa Rosa, California
  • Stockton

• Santa Fe
  • Gallup
  • Las Cruces
  • Phoenix
  • Tucson

• Seattle
  • Spokane
  • Yakima

• Washington
  • Saint Thomas