Jan Sebastian Söderberg (born 19 September 1990) is a Swedish professional golfer.
Söderberg turned professional in August 2013 and won twice on the Nordic Golf League the following month.
In 2014, he played all three stages of the European Tour qualifying school, finishing 39th. This earned him membership of the Challenge Tour for 2015.
Söderberg then played on the European Tour and Challenge Tour in 2015. In 2016, he won the inaugural event of the 2016 Challenge Tour season, the Barclays Kenya Open.
In June 2016, through sectional qualifying in England, he qualified for his first major championship entry, the U.S. Open at Oakmont Country Club in Pennsylvania, were he missed the cut by two strokes