Careless is the surname of:
Betty Careless (c. 1704–1739), notorious courtesan and bagnio owner in LondonGeorge Careless (1839–1932), Latter-day Saint composer and conductorJ. M. S. Careless (1919–2009), Canadian historian from the University of TorontoWilliam Careless, later known as William Carlos (c. 1610–1689), companion of King Charles II in his hiding in an oak tree in the English Civil War