| Type: | Bishop |
| Honorific-Prefix: | His Excellency |
| Anton Pain Ratu | |
| Honorific-Suffix: | S.V.D. |
| Bishop Emeritus of Atambua | |
| Diocese: | Kupang |
| Appointed: | 3 February 1984 |
| Term End: | 2 June 2007 |
| Predecessor: | Theodorus van den Tillaart |
| Successor: | Dominikus Saku |
| Previous Post: | Auxiliary Bishop of Atambua and Titular Bishop of Zaba (1982–1984) |
| Ordination: | 17 August 1958 |
| Ordained By: | Gabriel Manek |
| Consecration: | 21 September 1982 |
| Consecrated By: | Theodorus van den Tillaart |
| Birth Date: | 1929 1, df=yes |
| Birth Place: | Tanah Boleng, Dutch East Indies |
| Death Place: | Atambua, Indonesia |
| Motto: | Maranatha |
Anton Pain Ratu (2 January 1929 – 6 January 2024) was an Indonesian Roman Catholic prelate who was auxiliary bishop of Atambua from 1982 to 1984 and bishop of Atambua from 1984 to 2007.[1] Ratu died in Atambua on 6 January 2023, at the age of 95.[2]