Jan Koźmian (1812–1877) was a Polish literary figure, and a Roman Catholic priest after the death of his wife.
He founded and wrote for upwards of twenty years in the "Posen Review".
He and his brother Stanislaus Kozmian were the first secular workers for the revival of Catholic convictions in Poland.
The programme of the Review stated "That she may fulfil her mission, Poland must be united to the Church".
In a controversial essay he attacked the Jesuit Ivan Gagarin, who maintained that the great obstacle to the conversion of the Russians was that they identified Catholicism and Poland.