| Type: | Bishop |
| Honorific-Prefix: | His Grace |
| James Cornelius van Miltenburg | |
| Archbishop of Karachi | |
| Church: | Roman Catholic |
| See: | Roman Catholic Archdiocese of Karachi |
| Term: | (1948)1950-1958 |
| Predecessor: | Position created |
| Ordination: | 31 March 1935 |
| Consecration: | 3 October 1948 |
| Consecrated By: | Francesco Benedetto Cialeo |
| Birth Date: | 14 September 1909 |
| Birth Place: | Harmelen, Netherlands |
| Death Place: | Hyderabad, Pakistan |
| Nationality: | Dutch |
James Cornelius van Miltenburg O.F.M., also known as Alcuin van Miltenburg (14 September 1909 - 14 March 1966), was a Dutch prelate of the Catholic Church who was a missionary bishop in Pakistan, the first bishop of Karachi and of Hyderabad, Pakistan.
He was born on 14 September 1909 in Harmelen, Netherlands. He was ordained a Priest of the Order of Friars Minor on 31 March 1935.
Pope Pius XII named him the first Bishop of Karachi on 20 May 1948[1] and he received his episcopal consecration on 3 October. He became archbishop when the see of Karachi was raised to the status of an archdiocese in 1950.[2]
Appointed the Holy See's Apostolic Delegate on 17 September 1950,[3] he represented the Holy See in the Pakistan. When the status of the delegation was raised to of an internuncio, a status that anticipates the appointment of an official with rank of ambassador and an inappropriate role for the ordinary of a diocese, van Miltenburg led the internunciature as its chargé d’affaires and the office of internuncio remained vacant until after his departure from Karachi.[4]
Pope transferred him to the newly created Diocese of Hyderabad, Pakistan, allowing him to keep the personal title of archbishop.[5]
He was also a Council Father at all four sessions of the Second Vatican Council.
He died in Hyderabad, Pakistan, on 14 March 1966.[6]