Sondrio (It. Provincia di Sondrio) is a province in the Lombardy region of Italy. Its capital is the city of Sondrio. In Italy, the province (in Italian: provincia) is an administrative division of an intermediate level, between municipality (comune) and region (Regione). ... Lombardy (in Italian Lombardia) is a region in northern Italy between the Alps and the Po Valley. ... Sondrio (Latin Sundrium) is a town in the Province of Sondrio, in the region Lombardy in Italy. ...

It has an area of 3,212 km², and a total population of 176,856 (2001). There are 78 communes in the province, ranging in population from Sondrio to Pedesina (only 34 inhabitants) and in size from Valdidentro (244.41 km²) to Poggiridenti (2.93 km²) (source: Italian institute of statistics Istat, see this link).

The province is bounded with Switzerland with the Canton of Grisons to the north and west, provinces of Como and Lecco to the west, provinces of Bergamo and Brescia to the east and Trentino-Alto Adige with the provinces of Trento and Bolzano to the east. Grisons or Graubünden (German: Graubünden; Italian: Grigioni; Romansh: Grischun) is the largest and easternmost canton of Switzerland. ... Como (It. ... Lecco (It. ... Bergamo (It. ... Trentino-Alto Adige or Trentino-South Tyrol (in German: Trentino-Südtirol, in Italian: Trentino-Alto Adige) is an autonomous region in northern Italy. ... Trento (Italian Provincia autonoma di Trento, German Autonome Provinz Trient) is an autonomous province in the autonomous Trentino-Alto Adige region of Italy. ... South Tyrol (German Autonome Provinz Bozen-Südtirol, Italian Provincia autonoma di Bolzano-Alto Adige , Ladin Provinzia autonóma de Bulsan-Südtirol) is an autonomous province of Italy. ...