Dusík or its variant Dussek is a Czech surname. Notable people with the surname include:

• Jan Dusík (born 1975), Czech politician
• Jan Ladislav Dussek (1760–1812), Czech composer and pianist
• Joanna Dusik (born 1989), Polish skater
• Katerina Veronika Anna Dusíkova (1769–1833), also known as Veronika Dussek, Czech composer and pianist, sister of J. L. Dussek
• Olivia Buckley (1799–1847), also known as Olivia Dussek, English composer and harpist, daughter of J. L. Dussek
• Sophia Dussek (1775 – c. 1831), also known as Sophia Corri, Scottish composer, soprano and harpist, wife of J. L. Dussek

Jan Ladislav Dussek (baptized Václav Jan Dusík, with surname also written as Duschek or Düssek; February 12, 1760March 20, 1812) was a Czech composer and pianist. He was an important representative of Czech music abroad in the second half of the 18th century and the beginning of the 19th century. Some of his more forward-looking piano works have traits often associated with Romanticism.