The 27-year-old appeared at Chester Magistrates' Court in north west England to face accusations brought by three complainants.
The incidents are alleged to have taken place between October 2020 and August 2021. The France international wore a red hoodie and black tracksuit bottoms as he stood in the dock to hear the charges, speaking to confirm his name, age and address. He is alleged to have attacked the females, one aged under 18, at his home in Prestbury, Cheshire.
Judge Jack McGarva referred the case to Chester Crown Court, where the footballer is due to appear on September 10. City suspended Mendy on Thursday after police confirmed the Frenchman has been charged.
"The matter is subject to a legal process and the Club is therefore unable to make further comment until that process is complete," City's statement added.