The Official Municipality Key, formerly also known as the Official Municipality Characteristic Number or Municipality Code Number, is a number sequence for the identification of politically independent municipalities or unincorporated areas. Other classifications for the identification of areas include postal codes, NUTS codes or FIPS codes.

In Germany the Official Municipality Key serves statistical purposes and is issued by the statistics offices of individual German states. The municipality key is to be indicated in instances such as changing residence on the notice of departure or registration documents. This is done at the registration office in every town's city hall.

The municipality key consists of eight digits, which are generated as follows: The first two digits designate the individual German state. The third digit designates the government district (in areas without government districts a zero is used instead). The fourth and fifth digits designate the number of the urban area (in a district-free city) or the district (in a city with districts). The sixth, seventh, and eighth digits indicate the municipality or the number of the unincorporated area.

08 1 11 000: Stuttgart

• 08: Baden-Württemberg
• 1: Government district of Stuttgart
• 11: Urban area of Stuttgart
• 000: No other municipality is available, since Stuttgart is an urban area

15 3 52 002: Aschersleben

• 15: Saxony-Anhalt
• 3: Government district of Magdeburg
• 52: District of Aschersleben Staßfurt
• 002: City of Aschersleben

• 01: Schleswig-Holstein
• 02: Hamburg
• 03: Lower Saxony
• 04: Bremen
• 05: North Rhine-Westphalia
• 06: Hesse
• 07: Rhineland-Palatinate
• 08: Baden-Württemberg
• 09: Bavaria
• 10: Saarland
• 11: Berlin
• 12: Brandenburg
• 13: Mecklenburg-Vorpommern
• 14: Saxony
• 15: Saxony-Anhalt
• 16: Thuringia

The municipality identifier consists of five digits in Austria, which are generated as follows: The first digit designates the number of the Austrian state, the second and third digits designate the district, and the fourth and fifth digits designate the municipality.^[1]

3 25 21: Rappottenstein

• 3: Lower Austria
• 25: Zwettl district
• 21: Municipality of Rappottenstein

9 07 01: Vienna - Neubau

• 9: Vienna
• 07: Neubau (7th district)
• 01: District of Neubau

• 1 Burgenland
• 2 Carinthia
• 3 Lower Austria
• 4 Upper Austria
• 5 Salzburg
• 6 Styria
• 7 Tyrol
• 8 Vorarlberg
• 9 Vienna

The Swiss Federal Statistical Office generates code numbers with up to four digits, which are sequentially assigned in accordance with the official order of the cantons, districts, and municipalities.

See Code officiel géographique.

See System identyfikatorów i nazw miejscowości

A kommunkod (municipal code) is a numerical code given to all Swedish municipalities by the Swedish tax authorities. The code consists of four digits, the first two indicating which county the municipality is situated in, and the last two specific for the municipality.

The code system was introduced with the municipal reform of 1952. There were three different categories of municipalities at the time, which affected the number that they were allocated. Those with stad-status (cities) were given codes ending in 80 to 99, smaller towns (köping) 60 to 79 and rural municipalities 01 to 59. The county seats were allocated codes ending in 80.

As part of the reform in the early 1970s, the categorization of municipalities was abolished, but the code was in most cases preserved. When several municipalities were merged, the code for the biggest municipality was kept.

Usually known as the municipal code or PSGC code, the number comprises nine digits rrppmmbbb, for which rr = region code, pp = province code, mm = city / municipality code, bbb = barangay code.

For example, the municipality of Ubay, Bohol has a code of 071246000 meaning region 07 (Central Visayas), province 12 (Bohol), municipality 46 (Ubay) with barangay code of zero signifying "not at this level." Bongbong, one of its constituent barangays, has a code of 071246007.

The province code is unique and is independent of the region code. All PSGCs, are therefore, unique.

• Municipalities of Sweden
• List of municipalities of Sweden (with municipality codes)

• City listing with municipality key
• City listing with municipality key