The Monterufolino or Cavallino di Monterufoli is a breed of small horse originating in the province of Pisa in the Tuscany region of Italy. It is one of the fifteen indigenous horse breeds of limited distribution recognised by the AIA the Italian breeders' association. It takes its name from a former farm estate the Tenuta di Monterufoli now broken up which covered some 4000 Ha in the Communes of Pomarance Montecatini Val di Cecina and Monteverdi Marettimo.