- Address: 1229 Mt. Loretta Ave., Dubuque, IA 52003
- Telephone: 563-556-2580
- Website: http://www.dbqarch.org/
- Most Rev. Michael O. Jackels, Archbishop of Dubuque
- Mass times
- Catholic Schools of the Archdiocese of Dubuque
- Address: 780 West Central Park Ave., Davenport, IA 52804-1901
- Telephone: 563-324-1911
- Website: http://www.davenportdiocese.org/
- Most Rev. Thomas R. Zinkula, Bishop of Davenport
- Catholic Schools of the Diocese of Davenport
- Address: 601 Grand Ave., Des Moines, IA 50309
- Telephone: 515-243-7653
- Website: http://www.dmdiocese.org
- Most Rev. William M. Joensen, Bishop of Des Moines
- Mass Times
- Catholic Schools of the Diocese of Des Moines
- Address: 1821 Jackson Street, Sioux City, IA 51105
- Telephone: 712-255-7933
- Website: http://www.scdiocese.org
- Most Rev. R. Walker Nickless, Bishop of Sioux City
- Mass Times
- Catholic Schools of the Diocese of Sioux City