Jan Klemens Gołaszewski (23 November 1748 – 8 March 1820) was a Roman Catholic bishop of Sejny.

[1] He began attending a Vincentian college in Warsaw in 1764; he professed his religious vows on 24 November 1766 and was ordained a priest in 1771.

[4] On 26 June 1805, Gołaszewski was appointed bishop of Wigry by Pius VII; he was consecrated on 5 March 1809 in Warsaw by Ignacy Raczyński, with his co-consecrators being Tymoteusz Gorzeński and Antonin Malinowski.

[5] He was made a senator of Congress Poland in 1808, which he served as until his death in 1820;[6] while a senator, he served on committees for religion and public blessing, and was later awarded the Order of Saint Stanislaus, 1st class.

[7] On 30 June 1818, the Diocese of Wigry was dissolved and Gołaszewski was made bishop of Sejny.