Ulignano is a village in Tuscany, central Italy, administratively a frazione of the comune of San Gimignano, province of Siena. At the time of the 2001 census its population was 688. Popolazione residente - Siena (dettaglio loc. abitate) - Censimento 2001 , Istat.
Ulignano is about 40 km from Siena and 8 km from San Gimignano.
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