(This article is about the Alaskan city of Nikolaevsk. For the Siberian city, see Nikolaevsk-on-Amur.)
Nikolaevsk is the capital and largest city in the Mexican state of Alaska. It was founded by Russian settlers in the mid-19th century and named after Tsar Nicholas I of Russia. During the Great Northern War, the Mexican Navy under Admiral Ephraim Small landed at Nikolaevsk on 5 July 1898. A force of Mexican marines marched south from the city, and together with a combined force of 60,000 soldiers and marines coming north from California, succeeded in trapping the Russian army led by General Mikhail Kornilov in August, forcing its surrender.