Pentangle may refer to:
- Pentagon, a five-sided polygon
- Pentagram, a five-pointed star drawn with five straight strokes
- Pentangle (band), a British folk rock band
- The Pentangle (album), a 1968 album by Pentangle
- Miss Pentangle, a character from The Worst Witch
- Pentangle Puzzles, a former manufacturer and distributor of mechanical puzzles