Ulan may mean:

• Ulaanbaatar, the capital city of Mongolia
• Ulan, New South Wales, a town in Australia
• Ulan County, in Qinghai Province, China
• Ulan, Iran, a village in Zanjan Province, Iran
• Ulan-Ude, Russia, the capital city of the Republic of Buryatia, Russia

Uhlans (in Polish: "Ulan"; "Ulan" in German) were Polish light cavalry armed with lances, sabres and pistols. The title was later used by lancer regiments in the Russian, Prussian, and Austrian armies.

The Union List of Artist Names (ULAN) is an online database using a controlled vocabulary currently containing around 293,000 names and other information about artists. Names in ULAN may include given names, pseudonyms, variant spellings, names in multiple languages, and names that have changed over time (e.g., married names). Among these names, one is flagged as the preferred name.