| Type: | archbishop |
| Honorific-Prefix: | The Most Reverend |
| Sebastijan Glavinić | |
| Bishop of Senj-Modruš | |
| Archdiocese: | Senj-Modruš |
| Elected: | 19 April 1689 |
| Appointed: | 8 May 1690 |
| Term End: | 1697 |
| Predecessor: | Hyacinthus Dimitri OP |
| Successor: | Martin Brajković |
| Other Post: | Court chapelain (1664–1677) Vienna |
| Ordination: | 26 March 1660 |
| Consecration: | 8 February 1691 |
| Birth Name: | Sebastijan Glavinić |
| Birth Date: | before 18 January 1632 |
| Birth Place: | Pićan, Habsburg Empire (now Croatia) |
| Death Place: | Slovenske Konjice, Habsburg Empire, (now Slovenia) |
| Buried: | Archparish church of Saint George, Slovenske Konjice |
| Religion: | Roman Catholic |
| Coat Of Arms: | Glavinic de Glamoc family coat of arms.jpg |
| Sebastijan Glavinić | |
| Dipstyle: | The Most Reverend |
| Offstyle: | Your Excellency |
| Relstyle: | Bishop |
Sebastijan Glavinić (1632–5 July 1697) was a Habsburg Croatian Roman Catholic bishop and Latinist. Glavinić was born at Pićan, Istria, before 18 January 1632, a son of Nikola Glavinić. The Glavinić family fled from Glamoč (in Bosnia) to Istria due to the Ottoman invasion. He was baptized on 18 January 1632. Glavinić studied theology and philosophy in Graz, Wien and Trnava. He was ordained priest on 26 March 1660.[1]