This study, “Portrayal and Manifestations of Social Injustice in Selected Plays of Esiaba Irobi”, carefully examines and points out the persistent and prevalent social injustices in the Nigerian and African societies. The preponderance of social injustice in Nigeria and Africa has remained a topical issue for playwrights. Various forms and shades of social injustice are prevalent, including but not limited to: appropriating and exploiting natural resources by the privileged, misappropriation of public funds, denial of quality education, denial of basic health care and the non availability of basic amenities like water and power, and sundry others. Using Esiaba Irobi’s Nwokedi, Hangmen also Die and The Other Side of the Mask, the issue of social injustice is carefully explored. The study employs the Marxist theory because it triggers the quest for social transformation and liberation. The theory preaches equality for all; it condemns oppression and seeks to establish a classless society where equality reigns.