Ingrian (inkeroin keeli, Soikkola: [ˈiŋɡ̊e̞roi̯ŋ ˈke̝ːlʲi]), also called Izhorian (ižoran keeli, Soikkola: [ˈiʒ̥o̞rɑŋ ˈke̝ːlʲi], Ala-Laukaa: [ˈiʒo̞rəŋ ˈkeːlʲ]), is a Finnic language spoken by the (mainly Orthodox) Izhorians of Ingria. It has approximately 70 native speakers left, most of whom are elderly.

The Ingrian language should be distinguished from the Ingrian dialect of the Finnish language, which became the majority language of Ingria in the 17th century with the influx of Lutheran Finnish immigrants; their descendants, the Ingrian Finns, are often referred to as Ingrians. The immigration of Lutheran Finns was promoted by Swedish authorities, who gained the area in 1617 from Russia, as the local population was (and remained) Orthodox.

Four dialect groups of Ingrian have been attested, two of which are likely extinct:

A fifth dialect may have once been spoken on the Karelian Isthmus in northernmost Ingria and may have been a substrate of local dialects of southeastern Finnish.

Ingrian is classified, together with Finnish, Karelian (including Livvi), Ludic and Veps, in the Northern Finnic branch of the Uralic languages.

The exact origin of Izhorians, and by extension the Ingrian language, is not fully clear. Most scholars agree that Ingrian is most closely related to the Karelian language and the Eastern dialects of Finnish, although the exact nature of this relationship is unclear:

A popular opinion holds that the split of the Karelian and Ingrian languages can be traced back to around the 8th-12th centuries A.D., with the Ingrian language originating from a Pre-Karelian group travelling westward along the Neva river.

The first Ingrian records can be traced back to the Linguarum totius orbis vocabularia comparativa by Peter Simon Pallas, which contains a vocabulary of the so-called Chukhna language, which contains terms in Finnish, Votic, and Ingrian.