Vaculík (feminine Vaculíková) is a Czech surname, an archaic diminutive of the name Václav. Notable people include:
Kristina Vaculik, Canadian artistic gymnast; Ludvík Vaculík, Czech writer and journalist; Lukáš Vaculík (actor), Czech actor; Lukáš Vaculík (footballer), Czech footballer; Lukáš Vaculík (skier), Czech skier; Martin Vaculík, Slovak speedway rider; Ondřej Vaculík, Czech ski-jumper; Richie Vaculik, Australian mixed martial artist; Tereza Vaculíková, Czech freestyle skier.