#WWlgu hashtags are systematically defined for local government units.

Depending on the country the local government units are for states, provinces, districts, counties, cities, municipalities, etc.

For most countries in the world, key #WWlgu hashtags are included in their Actor Atlas lgu page (lgu is the abbreviation for local government unit).

#WWlgu hashtags are constructed using the ISO country code in combination with numerical (sometimes alphanumerical) codes that are used by the country's National Statistical System.

Currently "complete" #WWlgu guides exist for :