| Honorific-Prefix: | The Most Reverend |
| John James Joseph Monaghan | |
| Archbishop Of: | Bishop of Wilmington |
| See: | Diocese of Wilmington |
| Enthroned: | May 9, 1897 |
| Ended: | July 10, 1925 |
| Predecessor: | Alfred Allen Paul Curtis |
| Successor: | Edmond John Fitzmaurice |
| Ordination: | December 19, 1880 |
| Consecration: | May 9, 1897 |
| Other Post: | Titular Bishop of Lydda (1925–1935) |
| Birth Date: | 5 May 1856 |
| Birth Place: | Sumter, South Carolina |
| Death Place: | Wilmington, Delaware |
| Religion: | Roman Catholic Church |
| Consecrated By: | James Gibbons |
| Education: | St. Charles College St. Mary's Seminary |
| Ordained By: | Patrick Neeson Lynch |
| Coat Of Arms: | Coat of arms of John James Joseph Monaghan.svg |
John James Joseph Monaghan (May 23, 1856 – January 7, 1935) was an American prelate of the Roman Catholic Church. He served as bishop of the Diocese of Wilmington in Delaware from 1897 to 1925.
John Monaghan was born on December 19, 1880, in Sumter, South Carolina, to Thomas and Margaret (née Bogan) Monaghan, both Irish immigrants.[1] He graduated from St. Charles College in Ellicott City, Maryland, in 1876, and then studied theology at St. Mary's Seminary in Baltimore.
Returning to South Carolina, Monaghan was ordained to the priesthood by Bishop Patrick Neeson Lynch for the Diocese of Charleston on December 19, 1880.[2] [3] He first served as a curate at St. Joseph's Parish and afterwards at St. Patrick's Parish, both in Charleston, South Carolina. Monaghan was appointed pastor of St. Mary's Parish in Greenville, South Carolina, serving there from1882 to 1887. He then became pro-rector of the Cathedral of St. John the Baptist in Charleston and chancellor of the diocese (1887–1888). From 1888 to 1897, Monaghan was assistant to the vicar general at St. Patrick's Church.[4]
On January 26, 1897, Monaghan was appointed the third bishop of the Diocese of Wilmington by Pope Leo XIII. He received his episcopal consecration on May 9, 1987, from Cardinal James Gibbons, with Bishops Alfred Curtis and Henry Northrop serving as co-consecrators.
During his tenure, Monaghan established seven parishes, seven missions, and eight schools.[5] He also was instrumental in the establishment of the Oblate Fathers' Salesianum School for boys in Wilmington, St. Francis Hospital in Wilmington, and a home for the elderly.
On July 10, 1925, Pope Pius XI accepted Monaghan's resignation as bishop of Wilmington due to bad health and named him titular bishop of Lydda. John Monaghan died on January 7, 1935, at age 78 at St. Francis Hospital in Wilmington.