Ikwerre (Iwhuruohna) is a language spoken primarily by the Ikwerre people, who inhabit certain areas of Rivers State, Nigeria.

The Ikwerre language is an Igboid language of the Volta-Niger branch of Niger-Congo family of languages. Based on lexicostatistical analysis, Kay Williamson first asserted that the Ikwerre, Ekpeye, and Ogba, languages belonged to the same language cluster, and were not dialects. After subsequent studies and more research by both Williamson and Roger Blench, it was concluded that lexical similar languages like Ikwerre, Ogba, Igbo and Ekpeye form a "language cluster" and that they are somewhat mutually intelligible.

Alerechi (2018) states that there are 24 divergent dialects. Those starred (*) below are only provided with their abbreviations:^{[clarification needed]}

In addition, Glottolog lists two dialects that are unclear which of Alerechi's listing they correspond to (if any):

Ikwerre distinguishes vowels by quality (frontedness and height), the presence or absence of nasalization, and the presence or absence of advanced tongue root.^{[citation needed]}

There is also a vowel */ə̃/ which is posited to explain syllabic nasal consonants in accounts of the language which state that Ikwerre has no nasal stops. This sound is realized as [ɨ̃] or a syllabic nasal which is homorganic to the following consonant.^{[citation needed]} Alerechi (2018) states that while earlier sources treat [ɛ] as an allophone of /e/, this is only true for some dialects; in others, it is fully contrastive. In addition, Alerechi does not recognize a nasalized variant of this vowel.

Ikwerre exhibits two kinds of vowel harmony:

The tap /ɾ/ may sometimes be realized as an approximant [ɹ].^{[citation needed]}