Formanek (or Formánek) is a Czech and Slovak surname. It may refer to:
Bedrich Formánek (1933–2023), Slovak chess composer Edward W. Formanek (born 1942), U.S. mathematician and chess player Josef Formánek (born 1969), Czech writer, journalist, and traveler Michael Formanek (born 1958), U.S. jazz musician René Formánek (born 1975), Czech footballer Gregor Formanek (1924 - 2025) was a Romanian-German Nazi soldier