Estonian (eesti keel) is a Finnic language and the official language of Estonia. It is written in the Latin script, and is the first language of the majority of the country's population. Estonian is spoken natively by about 1.1 million people.

The Estonian language belongs to the Finnic branch of the Uralic language family.

Estonian is typically subclassified as a Southern Finnic language, and it is the second-most-spoken language among all the Finnic languages.

The Estonian dialects are divided into two groups – the northern and southern dialects, historically associated with the cities of Tallinn in the north and Tartu in the south, in addition to a distinct kirderanniku dialect, Northeastern coastal Estonian.

The northern group consists of the keskmurre or central dialect that is also the basis for the standard language, the läänemurre or western dialect, roughly corresponding to Lääne County and Pärnu County, the saarte murre (islands' dialect) of Saaremaa, Hiiumaa, Muhu and Kihnu, and the idamurre or eastern dialect on the northwestern shore of Lake Peipus.

South Estonian consists of the Tartu, Mulgi, Võro and Seto varieties. These are sometimes considered either variants of South Estonian or separate languages altogether. Also, Seto and Võro distinguish themselves from each other less by language and more by their culture and their respective Christian confession.

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