Ulrika Fredrika Bremer, née Salonius (24 April 1746 Åbo – 1 April 1798), was a ship owner and merchant in Swedish Finland. She was the paternal grandmother of Fredrika Bremer. After the death of her husband Jacob Bremer in 1785, at the age of 39, she took over his businesses and ships in Åbo (now Turku, Finland). She successfully managed his business empire over 13 years and was one of the richest Finnish women of her time.