Abstract: The effects of fish density on growth rate of African catfish (Clarias gariepinus) in two (2) different tanks with different stocking density shows that there was a general increase in weight and length in all fish during the experimental period. Fish were fed with coppens commercial feed containing 45 % crude protein at 5 % body weight. The mean weight of fish in tank one was 5.13 ± 0.23 g and tank two 5.09 ± 0.19 g and specific growth rate (SGR) for tank one (1.92 ± 0.01 %.day-1) was lower than that of tank 2 (3.62±0.01 %day-1). Condition factor of 12.21 ± 0.37 and 14.14 ± 0.84 were observed for tank one and tank two respectively. However, fish survival varied between 64.0 ± 0.0 to 80.0 ± 0.0 % for tank two and tank one respectively while the percentage mortality in tank two (36.0±0.01 %) was higher than tank one (20.0±0.01 %). Feed conversion ratio was fairly the same for fish in both tank one (0.39±0.01) and tank two (0.39±0.03). Percentage weight gain was higher in tank one than values obtained for fish in the tank two. The water qualities parameter for all the experimental tanks are as follows temperature 25.05±0.07 0C each, dissolved oxygen 6.00 ± 0.14 mg/l each, pH 8.20 ± 0.17 each, ammonia 0.40 ± 0.04 each and total hardness of 60.00±0.92 mg/l. These water quality parameters probably enhanced the observed good growth and condition of the test fish throughout the experimental period. The assessment of the effect of fish density on growth rate of African catfish (Clarias gariepinus) was tested using Analysis of Variance (ANOVA) at p = 0.05 level of significant.