Sigrid Fredrika Juliana Snoilsky (1813–1856) was a Swedish painter and countess.

[1] She was born Sigrid Fredrica Juliana Banér on 14 November 1813 in Östra Ryd parish, Östergötland, Sweden.

Her parents were Margareta von Both and Johan Gustaf Banér, a lieutenant colonel.

She married in 1840 to Nils Snoilsky, a Justice and Chamberlain Count.

Together they had a son, Carl Johan Gustaf Snoilsky who went on to become a known poet.