Francis August Anthony Joseph Janssens (October 17, 1843 – June 9, 1897) was a Dutch-born prelate of the Roman Catholic Church.

In 1866, Janssens went to the American College at Louvain, Belgium, planning to ultimately do mission work in the United States.

[3] Arriving at Richmond, Virginia, in September 1868, he was appointed rector of the cathedral in 1870 and served as vicar general under Bishops James Gibbons and John Joseph Keane.

[3] He received his episcopal consecration on May 1, 1881, from Archbishop James Gibbons, with Bishops Thomas Becker and John Keane serving as co-consecrators.

[3] During his tenure, Janssens completed construction on the Cathedral of St. Peter the Apostle in Jackson, Mississippi, which had commenced forty years earlier.