Portalbera is a comune

Comune

In Italy, the comune is the basic administrative division, and may be properly approximated in casual speech by the English word township or municipality.-Importance and function:...

(municipality) in the Province of Pavia

Province of Pavia

The Province of Pavia is a province in the region of Lombardy in northern Italy. Pavia is the capital.It has an area of 2,965 km², and a total population of 493,753...

 in the Italian

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 region Lombardy

Lombardy

Lombardy is one of the 20 regions of Italy. The capital is Milan. One-sixth of Italy's population lives in Lombardy and about one fifth of Italy's GDP is produced in this region, making it the most populous and richest region in the country and one of the richest in the whole of Europe...

, located about 40 km southeast of Milan

Milan

Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

 and about 15 km southeast of Pavia

Pavia

Pavia , the ancient Ticinum, is a town and comune of south-western Lombardy, northern Italy, 35 km south of Milan on the lower Ticino river near its confluence with the Po. It is the capital of the province of Pavia. It has a population of c. 71,000...

. As of 31 December 2004, it had a population of 1,434 and an area of 4.7 km².

The municipality of Portalbera contains the frazione

Frazione

A frazione , in Italy, is the name given in administrative law to a type of territorial subdivision of a comune; for other administrative divisions, see municipio, circoscrizione, quartiere...

(subdivision) San Pietro.

Portalbera borders the following municipalities: Arena Po

Arena Po

Arena Po is a comune in the Province of Pavia in the Italian region Lombardy, located about 45 km southeast of Milan and about 20 km southeast of Pavia...

, Spessa

Spessa

Spessa is a comune in the Province of Pavia in the Italian region Lombardy, located about 40 km southeast of Milan and about 15 km southeast of Pavia...

, Stradella.