Plater is a surname, and may refer to:

People

• Felix Plater (1536–1614), Swiss physician
• George Plater (1735–1792), American lawyer and politician
• Thomas Plater (1769–1830), American lawyer and politician
• Emilia Plater (1806–1831), Polish–Lithuanian noble and revolutionary
• Władysław Plater (1808–1889), Polish–Lithuanian count
• Jurgis Pliateris (1810–1836), Polish–Lithuanian noble and bibliographer
• Cecylia Plater-Zyberk (1853–1920), Polish social activist and educationalist
• Kazimierz Plater (1915–2004), Polish chess master
• Alan Plater (1935–2010), English playwright and screenwriter
• Bobby Plater (1914–1982), American jazz alto saxophonist
• Elizabeth Plater-Zyberk (1950–), American architect
• Steve Plater (1968–), English motorcycle racer
• Matthew Plater (1995-), English cricketer

Other

• Plater College, established in 1922 in Headington, Oxford
• Duany Plater Zyberk & Company, American architecture firm
• Plater coat of arms
• Plater, German and Polish noble family