| Yakiv Tymchuk, O.S.B.M. | |
| Birth Name: | Yaroslav Hryhorovych Tymchuk |
| Birth Date: | 1919 8, df=yes |
| Death Place: | Chortkiv, Soviet Union, now Ukraine |
| Bishop Of: | Ukrainian Catholic Eparchy of Ivano-Frankivsk (auxiliary) |
| Appointed: | 1977 |
| Ordination: | 3 January 1943 (Priest) |
| Ordained By: | Bl. Hryhorij Lakota |
| Consecration: | 1977 (Bishop) |
| Consecrated By: | Sofron Dmyterko |
Yakiv Yaroslav Tymchuk, O.S.B.M. (uk|Яків Ярослав Тимчук; 24 August 1919 – 20 December 1988) was a Ukrainian Greek Catholic clandestine hierarch. He was an auxiliary bishop of the Ukrainian Catholic Eparchy of Ivano-Frankivsk from 1977 to 1988.
Born in Duplyska, Second Polish Republic (present-day – Ternopil Oblast, Ukraine) in 1919 and in 1934 joined the religious Order of Saint Basil the Great.[1] He was professed on 31 March 1936, solemn professed on 27 September 1942 and was ordained a priest on 3 January 1943 by Blessed Bishop Hryhorij Lakota. After ordination he served a short time in the monastery in Hoshiv and then as parish priest in Chortkiv.[1] He was arrested, because the Communist regime abolished the Greek-Catholic Church, but after short time released from prison and clandestinely continued to serve as priest.[1]
On 1977 Fr. Tymchuk was consecrated to the Episcopate as auxiliary bishop. The principal and single consecrator was clandestine bishop Sofron Dmyterko.[2]
He died on 20 December 1988.