Ruizia (disambiguation)

Ruizia may refer to:
 * Ruizia, a genus of plants in the family Malvaceae
 * Ruizia, a synonym of Peumus, a genus of plants in the family Monimiaceae
 * Ruizia, synonym of Rhigonema, a genus of nematodes in the family Rhigonematidae
 * Ruizia, a publication of the Royal Botanical Garden of Madrid