What city or area was Demeter the patron goddess of?

Demeter, the ancient Greek goddess of agriculture, grain, and fertility, was primarily associated with the city of Eleusis, located near Athens. Eleusis was known for the Eleusinian Mysteries, sacred rituals held in her honor that celebrated the cycle of life and death through the changing seasons. Additionally, she was venerated throughout Greece, particularly in rural areas where agriculture was vital to daily life.