Santo Domingo Oeste is a municipality

Municipalities of the Dominican Republic

The provinces of the Dominican Republic are divided into two or more municipalities with the exception of the Distrito Nacional which consist of only one municipality Santo Domingo...

 of the Santo Domingo province in the Dominican Republic

Dominican Republic

The Dominican Republic is a nation on the island of La Hispaniola, part of the Greater Antilles archipelago in the Caribbean region. The western third of the island is occupied by the nation of Haiti, making Hispaniola one of two Caribbean islands that are shared by two countries...

. As of the 2008 census the municipality had 701,847 inhabitants, 432,112 living in the city itself and 269,735 in its rural district

District

Districts are a type of administrative division, in some countries managed by a local government. They vary greatly in size, spanning entire regions or counties, several municipalities, or subdivisions of municipalities.-Austria:...

s (Secciones).

For comparison with other municipalities and municipal districts see the list of municipalities and municipal districts of the Dominican Republic.

Santo Domingo Oeste was created as municipality in 2001 by law 163-01 splitting the Santo Domingo province from the Distrito Nacional

Distrito Nacional

The Distrito Nacional is a subdivision of the Dominican Republic enclosing the capital Santo Domingo. It is not within any of the provinces, but is itself counted as a province. Before October 16, 2001, the Distrito Nacional was much larger, including what is now known as Santo Domingo Province....

 including parts of metropolitan Santo Domingo

Santo Domingo

Santo Domingo, known officially as Santo Domingo de Guzmán, is the capital and largest city in the Dominican Republic. Its metropolitan population was 2,084,852 in 2003, and estimated at 3,294,385 in 2010. The city is located on the Caribbean Sea, at the mouth of the Ozama River...

 west of the DR-1

DR-1

DR-1 is a dual carriageway highway that forms part of the five designated national highways of the Dominican Republic. DR-1 provides a fast connection between Santo Domingo, the capital, on the southern coast, and the second city Santiago and the rest of the northerly Cibao region, one of the...

(Autopista Duarte).