The district of Aachen is a district in the west of North Rhine-Westphalia

North Rhine-Westphalia

North Rhine-Westphalia is the most populous state of Germany, with four of the country's ten largest cities. The state was formed in 1946 as a merger of the northern Rhineland and Westphalia, both formerly part of Prussia. Its capital is Düsseldorf. The state is currently run by a coalition of the...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. Neighboring districts are Heinsberg

Heinsberg (district)

Heinsberg is a Kreis in the west of North Rhine-Westphalia, Germany. Neighboring districts are Viersen, district-free city Mönchengladbach, Neuss, Düren and Aachen, and also the Dutch province Limburg.-History:...

, Düren

Düren (district)

Düren is a Kreis in the west of North Rhine-Westphalia, Germany. Neighboring districts are Heinsberg, Neuss, Rhein-Erft-Kreis, Euskirchen and Aachen.-History:...

, Euskirchen

Euskirchen (district)

Euskirchen is a Kreis in the south-west of North Rhine-Westphalia, Germany. Neighboring districts are Aachen, Düren, Rhein-Erft-Kreis, Rhein-Sieg, Ahrweiler, Daun, Bitburg-Prüm, and the Liège province .-History:...

, and also the Netherlands

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

 province of Limburg

Limburg (Netherlands)

Limburg is the southernmost of the twelve provinces of the Netherlands. It is located in the southeastern part of the country and bordered by the province of Gelderland to the north, Germany to the east, Belgium to the south and part of the west, andthe Dutch province of North Brabant partly to...

 and the Belgian

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 province of Liège

Liège (province)

Liège is the easternmost province of Belgium and belongs to the Walloon Region. It is an area of French and German ethnicity. It borders on the Netherlands, Germany, Luxembourg, and in Belgium the provinces of Luxembourg, Namur, Walloon Brabant , and those of Flemish Brabant and Limburg . Its...

.
Becoming effective on 21 October 2009, the Städteregion Aachen (literally: "cities region" Aachen) was formed from the former district Aachen (Kreis Aachen) and the city of Aachen. This is the first Städteregion that was formed in North Rhine-Westphalia.