Alexander Ursenbacher (born 26 April 1996) is a Swiss professional snooker player from Rheinfelden.
He is Switzerland's second professional snooker player after Darren Paris, who competed on the main tour in the mid-1990s.
He is often called by the nickname 'The Swiss Fish'.
Having qualified for the main tour through Q-School in 2013, where he defeated Paul Wykes in his quarter-final match, Ursenbacher lost his professional status upon the expiry of his two-year tour card in 2015, however regained it two years later after defeating Jackson Page 6–4 in the final of the 2017 EBSA European Under-21 Snooker Championship.