Ambroziak (Polish pronunciation: [amˈbrɔʑak]) is a Polish surname. People with the surname include:
- Ewa Ambroziak (born 1950), Polish athlete
- Jeffrey Ambroziak (born 1966), American cartographer, inventor, and attorney
- Peter Ambroziak (born 1971), Canadian former professional ice hockey player, former coach and executive
- Sylwester Ambroziak (born 1964), Polish sculptor
- Zdzisław Ambroziak (1944–2004), Polish volleyball player