| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Teodor Skuminowicz | |
| Auxiliary Bishop of Vilnius Titular Bishop of Gratianopolis | |
| Church: | Catholic Church |
| Archdiocese: | Diocese of Vilnius |
| Term: | 1652–1668 |
| Consecration: | 29 September 1652 |
| Consecrated By: | Marcantonio Franciotti |
| Death Date: | 24 September 1668 |
| Death Place: | Vilnius, Lithuania |
Teodor Skuminowicz or Theodorus Skumin (died on 24 September 1668) was a Roman Catholic prelate who served as Auxiliary Bishop of Vilnius (1652–1668) and Titular Bishop of Gratianopolis (1652–1668).
On 12 August 1652, Teodor Skuminowicz was appointed during the papacy of Pope Innocent X as Auxiliary Bishop of Vilnius and Titular Bishop of Gratianopolis. On 29 September 1652, he was consecrated bishop by Marcantonio Franciotti, Cardinal-Priest of Santa Maria della Pace, with Giovan Battista Foppa, Archbishop of Benevento, and Ranuccio Scotti Douglas, Bishop Emeritus of Borgo San Donnino, serving as co-consecrators.He served as Auxiliary Bishop of Vilnius until his death on 24 September 1668.