Democratization process has become the global demand of the present century. The Millennium Development Goal (MDG) gave credence to this development. Nigeria and South Africa have had checkered history of dictatorship under military rule and obnoxious apartheid policy respectively. Both countries embraced the current wave in the 1990s. The exploration of this development is our central focus. To do this, the paper examined the following: the relationship between type of electoral system and the conduct of elections in Nigeria and South (...) Africa; and the efficacy of majoritarian and proportional representation systems as applied in both countries. Our findings indicated that majoritarian system accounted for electoral irregularities while proportional representation contributed to wide acceptance of polls. The data were generated from the secondary source. We recommended the adoption of the proportional electoral system as practiced in South Africa and absolute constitutionalism for both countries so as to engender the principles of rule of law. (shrink)