Vlasák (feminine Vlasáková) is a Czech surname denoting a person with a large amount of hair (). Notable people include: Hana Vlasáková, Czech volleyball player Jerry Vlasak, American surgeon Lavínia Vlasak, Brazilian actress Lenka Vlasáková, Czech actress Oldřich Vlasák, Czech politician Oldřich Vlasák (wrestler), Czech wrestler Tomáš Vlasák, Czech ice hockey player Wlassak is a Germanized version of the surname. Rudolf Wlassak, Austrian physiologist Czech-language surnames