| Type: | Bishop |
| Thomas Hahót | |
| Archbishop of Kalocsa | |
| Enthroned: | 1254 |
| Ended: | 1256 |
| Predecessor: | Benedict |
| Successor: | Smaragd |
| Other Post: | Vice-chancellor |
| Previous Post: | Provost-elect of Fehérvár |
| Death Date: | 1256 |
| Nationality: | Hungarian |
| Religion: | Catholic |
| Residence: | Kalocsa Cathedral |
| Parents: | Buzád III Hahót Eve Atyusz |
Thomas from the kindred Hahót (Hungarian: Hahót nembeli Tamás; died 1256) was a Hungarian prelate, who served as the Archbishop of Kalocsa from 1254 to 1256.
Thomas was born into the Buzád branch of the gens Hahót as the son of Buzád III Hahót and Eve Atyusz. His grandfathers were Buzád II Hahót, a notable baron and later Dominican martyr of the Christian Church, and Sal Atyusz, who held the position of ispán of Karakó ispánate in 1205. Thomas had three siblings: Sal, a clergyman, Atyusz, who governed several counties since the 1270s and was head of the household of Queen Mother Tomasina Morosini for a time, and an unidentified sister, who married local nobleman Ant Lőrinte from Zala County.[1]
Thomas was first mentioned in 1227 by a contemporary document, when he inherited the estate of Bersen from his maternal grandfather, Sal Atyusz. He entered ecclesiastical service. In 1243, he was mentioned as provost of Buda. In this capacity, he filed a lawsuit against the burghers of Buda who declined to recognize his judicial authority. King Béla IV of Hungary ruled in favor of Thomas. From 1252 to 1254, he served as vice-chancellor in the royal court, in addition to his church office of provost-elect of Fehérvár.
Benedict, the Archbishop of Kalocsa elevated to the position of Archbishop of Esztergom in April 1254, confirmed by Pope Innocent IV. The archiepiscopal see in Kalocsa remained vacant for the upcoming months. In the second half of 1254, Thomas Hahót was elected as Archbishop of Kalocsa, proving by a letter from Innocent's successor, Pope Alexander IV, dated 12 February 1255. According to this, the Pope urged the canons of archdiocese, Lawrence of Kalocsa and Nicholas of Bács, to finance retrospectively the electoral process of Archbishop Thomas with borrowing 150 denari. His brother Sal functioned as lector at the Bács Cathedral (today in Bač, Serbia), the second seat of the archbishopric during his term. However Thomas soon died in late 1256. Smaragd succeeded him in the next year.