Sylwia Ejdys-Tomaszewska (born 15 July 1984 in Bogatynia) is a Polish middle distance runner who specialises in the 1500 metres. She competed in the event at the 2008 Summer Olympics. Her personal best for the distance is 4:02.30 minutes. She improved her 3000 m personal best at the BW-Bank Meeting in February 2011, taking second place with a time of 8:43.22 minutes.