Ridel is a surname. Notable people with the surname include:
Geoffrey Ridel, Duke of Gaeta (died 1084), the Duke of Gaeta as a vassal of the Prince of Capua from 1067 or 1068 Geoffrey Ridel (bishop of Ely) (died 1189), the nineteenth Lord Chancellor of England, from 1162 to 1173 Geoffrey Ridel (royal justice) (died 1120), landholder and royal justice during the reign of King Henry I of England Gualganus Ridel, the Duke of Gaeta as a vassal of the Prince of Capua in the late 1080s until 1091 Kevin Ridel, American musician and songwriter Raynald Ridel, the Duke of Gaeta as a vassal of the Prince of Capua from 1086 until his death Stefanie Ridel (born 1973), American singer, songwriter, and actress Vladimir Ridel (born 1985), Russian professional football player
See also Ridell, surname Rydel, given name and surname