Demetria

Demetria may refer to:


 * Alternative form of Demeter (Δημήτηρ), Greek goddess of harvest
 * Demetria (bacteria), a genus of bacteria from the family Dermacoccaceae
 * Demetria (name), a feminine given name (and list of people with that name)
 * Demetria, a fictional planet in the CrossGen comics Sigilverse