Nicholas Anthony DiMarzio (born June 16, 1944) is an American prelate of the Roman Catholic Church[1][2] who served as bishop of the Diocese of Brooklyn in New York City from 2003 to 2021.

His father served in the US Armed Forces, but later worked as a health inspector for the city of Newark.

He received a Bachelor of Sacred Theology degree in 1970 from The Catholic University of America in Washington, D.C.[4] DiMarzio is a certified social worker.

He also created the Catholic Legal Immigration Network (CLINIC),[6] serving as chairman for six years.

DiMarzio was awarded a Master of Social Work degree from Fordham University in New York City in 1980.

In 1986, DiMarzio was named a prelate of honor, with the title of monsignor, by Pope John Paul II.

[5] In 1991, then Archbishop Theodore McCarrick appointed DiMarzio as associate executive director of Catholic Community Services in Newark.

He also held the title of vicar for human services and vice president of the board of Cathedral Healthcare System.

[5] In 2000, DiMarzio was appointed a member of the Pontifical Council for the Pastoral Care of Migrants and Itinerant People.

[citation needed] On Jun 7, 1999, John Paul II appointed DiMarzio as the sixth bishop of the Diocese of Camden.

[1] One of DiMarzio's first acts was to speak at the Immigrant Workers Freedom Ride Rally at Flushing Meadows Park in Queens, New York.

He later attended the Fifth World Congress of the Pontifical Council for the Pastoral Care of Migrants and Itinerant People in Rome.

[citation needed] In 2003, DiMarzio was invited to join the Global Commission on International Migration, sponsored by the United Nations.

On December 31, 2005, it published a report, entitled "Migration in an interconnected world; New directions for action".

[16] He also appeared weekly on Currents in a segment titled "Into the Deep", where he discussed diocesan, local, national and international news.

On June 16, 2019, DiMarzio submitted his letter of resignation to Pope Francis upon reaching the age of 75, as required by canon law.

[17] DiMarzio visiting Buffalo three times, interviewing over 80 officials, clergy and laypeople He submitted a report to the Vatican at the beginning of November.

[23] On Sept. 1, 2021 the Archdiocese of Newark announced that the Congregation of the Doctrine of the Faith at the Vatican found the accusations by Matzek and Tadros against DiMarzio to “not to have the semblance of truth”.

He lobbied Congress for more lenient laws while serving as head of the USCCB Office of Migration and Refugee Services.

He worked with other dioceses and seminaries in the U.S. to receive seminarians from Haiti, South Korea, Vietnam, and Poland.