Polyhex can mean:

• Polyhex (mathematics), a class of mathematical shapes
• Polyhex (Transformers), a fictional city in the Transformers stories

• St. Bernard, Louisiana
• St. Bernard, Nebraska
• St. Bernard's Catholic Church (Hoven, South Dakota)
• St Bernard's Catholic School, Buckinghamshire
• St. Bernard's Chapel (Towners, New York)
• St. Bernard's Church (Akron, Ohio)
• St. Bernard's Church, Gibraltar
• St Bernard's College, Melbourne
• St Bernard's College, Oxford
• St. Bernard's College, Oxford
• St Bernard's High School and Arts College
• St. Bernards High School (disambiguation)
• St. Bernard's High School, Westcliff-on-Sea
• St. Bernard, Southern Leyte
• St. Bernard Sports
• St. Bernard's School
• St. Bernard's – Jacques Fontaine
• St. Bernardus
• St. Bernard’s School (Manhattan)
• St. Bernhard-Frauenhofen
• St. Bernulphusgilde
• St. Beuno
• St Beuno's
• St Beuno's Church, Aberffraw
• St. Beuno's Church. (Berriew)