| Name | Ordination Date | Credentials |
|---|---|---|
| Ronald J. Noorman | September 22, 1966 | First CRC Classis Grandville |
| Adam Nordyke | August 21, 2011 | Second Church Classis Zeeland |
| Karen L. Norris | December 5, 2008 | Fellowship CRC Classis Alberta North |
| Richard S. Nyboer | March 1, 2002 | |
| Ronald J. Nydam | October 20, 1974 | Hope Fellowship CRC Classis Rocky Mountain |
| Kenneth J. Nydam | October 11, 1981 | Cadillac Christian Reformed Church Classis Northern Michigan |
| Anastaze Nzabonimpa | April 14, 2024 | Alger Park CRC Classis Grand Rapids South |
| Richard G. Oberg | September 29, 2002 | East Palmyra CRC Classis Atlantic Northeast |
| Brian L. Ochsner | August 27, 2006 | Faith CRC Classis Central Plains |
| Arek E. O'Connell | November 5, 2017 | Hillside Community Church Classis Grand Rapids South |
| Cameron Oegema | October 15, 2023 | Bethel CRC Classis Huron |
| Robert L. Offringa | December 3, 1989 | |
| Christian Y. Oh | February 7, 1988 | Han-Bit Korean CRC Classis Lake Erie |
| Insoo Oh | April 24, 2022 | Namu Church of New York Classis Hudson |
| KiHyun Oh | December 14, 2003 | |
| Peter H. Oh | October 5, 2008 | San Jose New Hope CRC Classis Central California |
| Charles Oh | October 1, 1999 | TtoKamsa Mission Church Classis Greater Los Angeles |
| JongPil Oh | October 1, 2008 | |
| Sang Kyu Oh | September 14, 2014 | Abundant Life Korean Church Classis Hanmi |
| Eun Suk Oh | January 15, 2023 | New Westminster CRC Classis B.C. North-West |
| Jin Hwan H. Oh | September 16, 1997 | |
| Jong-Bam Oh | March 5, 2013 | |
| John S. Oh | October 22, 1998 | Korean-American CRC of Orange County Classis California South |
| Cornelius H. Oldenburg | January 1, 1931 | |
| Eddy A. Olguin | October 1, 2003 | Amistad Cristiana CRC Classis Iakota |
| Benjamin M. Oliveira | October 10, 2008 | First Christian Reformed Church Classis Muskegon |
| Katrina J. Olson | October 31, 2021 | |
| Zachary J. Olson | November 20, 2009 | Sunlight Ministries Classis Southeast U.S. |
| Petrus Onggomuljono | November 9, 2003 | Immanuel CRC Classis B.C. North-West |
| John A. Ooms | September 24, 1981 | Inglewood CRC Classis Alberta North |
| Matthew D. Ooms | November 12, 2001 | Madison Square CRC Classis Grand Rapids East |
| Wybren H. Oord | October 5, 1986 | |
| Derk Oostendorp | January 19, 1968 | Plymouth Heights CRC Classis Grand Rapids East |
| Jessica J. Oosterhouse | November 25, 2012 | |
| Jeremy Oosterhouse | March 21, 2021 | Bethel CRC Classis Illiana |
| Thomas J. Oosterhuis | January 23, 1976 | West End CRC Classis Alberta North |
| Gerald Oosterveen | September 30, 1966 | |
| George M. Ophoff | January 1, 1921 | |
| Donald R. Orange | May 27, 2018 | Fellowship Christian Reformed Church Classis Rocky Mountain |
| Ricardo E. Orellana | December 10, 1994 | The Journey Classis Rocky Mountain |
| Hector Raul Orlandi | September 1, 2003 | Iglesia Cristiana Reformada Vida Nueva CRC Classis Southeast U.S. |
| Ramon L. Orostizaga | September 22, 2002 | Jersey City Mission Classis Hackensack |
| Guillermo Ortiz | May 7, 1991 | |
| James D. Osterhouse | October 1, 1971 | Calvary CRC Classis Holland |
| Rudy W. Ouwehand | September 28, 1979 | Trinity CRC Classis B.C. South-East |
| Timothy J. Ouwinga | September 15, 1981 | Faith CRC Classis Iakota |
| John M. Ouwinga | September 22, 1974 | Moline CRC Classis Grand Rapids South |
| Cornelius C. Overduin | September 27, 1985 | First CRC of Toronto Classis Toronto |
| Timothy Overweg | November 28, 1993 | |
| Jonathan S. Owens | September 9, 2018 |