Hogweed is a common name for several unrelated plants.

Hogweed may refer to:

• Heracleum, a genus in the carrot family containing several plants often called hogweed, including:
  • Heracleum sphondylium, the common hogweed
  • Heracleum mantegazzianum, the giant hogweed
  • Heracleum sosnowskyi, Sosnowsky's hogweed
  • Heracleum persicum, Persian hogweed
• Boerhavia, a genus in the four o'clock flower family containing species sometimes called hogweed
• Zaleya galericulata, a species in the iceplant family, formerly in the genus Trianthema

• Pigweed