Tomašić () is a Croatian surname. Notable people with the name include:
Andy Tomasic (1917–2008), American football and baseball player Dinko Tomašić (1902–1975), Croatian sociologist Franjo Tomašić (1761–1831), Croatian nobleman and field marshal Igor Tomašić (born 1976), Croatian-Bulgarian footballer Luca Tomašić (born 1983), Italian footballer Ljudevit Tomašić (1901–1945), Croatian politician Marijan Tomašić (born 1986), Croatian footballer Nikola Tomašić (1864–1918), Croatian politician Ruža Tomašić (born 1958), Croatian politician