Igboid languages constitute a branch of the Volta–Niger language family. It includes Ekpeye, Ukwuani, and the Igbo languages:

• Ekpeye
• Igbo: Igbo proper, Ikwerre, Ika, Izii–Ikwo–Ezza–Mgbo, and Ogba.

 Williamson and Blench conclude that the Igbo languages (Igboid apart from Ekpeye) form a "language cluster" and that they are somewhat mutually intelligible. However, mutual intelligibility is only marginal, even among the Izii–Ikwo–Ezaa–Mgbo languages.