The population of Blouberg declined from 182 003 in 2000 to 176 135, before declining further to 172 601 in 2016. Of the four constituent municipalities of Capricorn District, Blouberg is the only municipality that saw a decline in its population. The amalgamation with Aganang led to an increase in the population starting from 2015 onwards (by 1.2%), but still far lesser than the population of Blouberg alone in 2000. This decline can be attributed to among other things, the low fertility rate, high mortality rate compared to birth rate or the out migration by the economically active population to the industrial centers such as Polokwane and Gauteng to seek better economic prospects

According to Stats SA, the municipality has five national groupings that reside within its area of jurisdiction and they are Black Africans, Colored, Indians and Whites. The majority is Black Africans who constitute 99% of the total population and live in the tribal areas. The female gender are dominant and the majority is youth.