Bishop Jan Niemiec (Ukrainian: Ян Нємєц; Polish: Jan Niemiec; 14 March 1958 – 27 October 2020) was a Polish-born Ukrainian Roman Catholic prelate, who served as an Auxiliary bishop of the Roman Catholic Diocese of Kamyanets-Podilskyi and the Titular Bishop of Decoriana since 21 October 2006 until his death on 27 October 2020.

After his ordination he served as an assistant parish priest in Poland from 1987 until 1992, when he has been transferred to Ukraine.

Niemiec is working in the Roman Catholic Diocese of Kamyanets-Podilskyi as the professor, prefect (1992–2001) and rector (2001–2007) of the Major Theological Seminary in Horodok.

On 8 December 2006, he was consecrated as bishop by Cardinal Marian Jaworski and other prelates of the Roman Catholic Church in the Cathedral of Sts.

[2] On 12 April 2007, Bishop Niemiec was appointed as a Vicar General of the same diocese.