Blöndal is an Icelandic surname. Notable people with the surname include:
Auðunn Blöndal (born 1980), Icelandic television personality, actor, and comedian Björn Blöndal (1787–1846), Icelandic District Commissioner (sýslumaður) and politician Halldór Blöndal (born 1938), Icelandic politician of the Icelandic Independence Party Lárus Blöndal (1836–1894), Icelandic sýslumaður and alþingismaður Pétur Blöndal (1944–2015), Icelandic parliamentarian of the Icelandic Independence Party Sigfús Blöndal (1874–1950), Icelandic language author and librarian Sölvi Blöndal (born 1975), member of Icelandic rap rock band Quarashi