Ptak is a Polish surname (meaning "bird"), and may refer to:
Alexander Ptak (born 1977), professional footballer Barbara Ptak (1930–2025), Polish costume designer Bernard Ptak (born 1954), Polish politician Claire Ptak, British baker Franciszek Ptak (1859–1936), Polish politician Krzysztof Ptak (1954–2016), Polish cinematographer Robt Ptak (born 1970), American guitarist and musician Tomasz Ptak (born 1992), Polish footballer Włodzimierz Ptak (1928–2019), Polish immunologist
See also Ptak (Włodzickie Hills), a hill in Lower Silesian Voivodeship, Poland