Abstract: This study has examined the concept of Bernadelli waves and discovered that the Leslie matrix approach can be used to predict the future population of a country. However, it is pertinent to mention that for this method to be useful, a reliable and precise census survey is a very important factor since a growth rate with maximum accuracy is highly needed. However, government should take the issue of census survey serious; it should not be seen from a political point of view but from economic and growth purposes since it can be use for policy making and implementation.