Where this fits. This entry sits in the *Reversal File* series — policies announced, harm done, then formally reversed. The political narrative of the 1962/63 crisis itself is at The Census Crisis; the analysis of why Nigeria has not counted itself since 2006 is at No Census Since 2006.
The 1962/63 census is the prototype of every later Nigerian "controversial enumeration", and a textbook case of a policy reversed not by protest but by political deadlock.
## The policy
The 1962 census was the first post-independence count. It mattered because regional revenue allocation, parliamentary seats and the federal balance of power between the Northern, Western, Eastern and Mid-Western regions all depended on the result. The Eastern and Western regions returned numbers that — by the time they had been "verified" through internal regional review — gave the south a combined population larger than the north. The Northern Region rejected this outright.
## The harm before reversal
The 1962 figures were never published. A re-count was ordered for November 1963. This time the Northern Region returned numbers showing that the north alone was larger than the rest of the federation combined, with growth rates between 30% and 70% over the 1952/53 colonial figure that statisticians correctly described as biologically impossible. The Eastern Region rejected the 1963 figures; the Action Group in the West rejected them; the federal government accepted them anyway.
The 1963 census became the legal-constitutional fact that underpinned the 1964 federal election crisis, the Western Region "Wild Wild West" emergency of 1965, the January 1966 coup and the slide into civil war. See First Republic Collapse and January 1966 Coup.
The 1973 census (under Gowon) was conducted to provide a fresh basis for state creation and revenue allocation. It produced an even more extreme north/south split, was rejected immediately by all four southern regions, and was formally cancelled on 1 May 1975 by the incoming Murtala regime. Nigeria's national accounts continued to use the 1963 figure as the legal population until the 1991 census.
## The reversal mechanism
Each census was reversed by a different mechanism: the 1962 by internal NPC non-publication; the 1963 by regional rejection and ultimately by the civil war that the 1963 figures helped to cause; the 1973 by a formal head-of-state announcement.
## What stayed reversed and what didn't
The specific numbers were repudiated. The political-economy logic — that population figures determine money and seats, and that no honest enumeration is therefore possible — has never been reversed. The 2006 census produced state-level disputes that are still litigated; the 2018, 2022 and 2024 census attempts were each postponed. See The Population Question.