Kasha-Ruwa Reservoir, Gusau was the main water source for domestic uses in Gusau before construction of Yardantsi Reservoir in 1980s. Various anthropogenic activities are carried out in the reservoir and its surroundings which could adversely impact it, hence this study on the composition, abundance, and distribution pattern of macro-benthic invertebrates in the reservoir. Three stations were selected across the reservoir. Macro-benthos were collected using Surber sampler (0.1m², 250μm mesh) and sieved through 250μm mesh sieve. The residues were preserved in 70% ethyl alcohol and labelled for identification of macro-benthos using appropriate guides.  Two hundred and forty-seven (247) macro-benthos/m² belonging to 21 species and three phyla (Annelida, Mollusca, and Arthropoda) were identified. Arthropoda had the highest abundance (200 individuals/m²) while Mollusca had the least (22 individuals/m²). Chironomus plumosus was the most abundant species (21.05%), while Melanoides tuberculata, Nepa cineria and Potamonautes sidneyi were the least abundant (1.21% each). The macro-benthos of the reservoir was dominated by pollution-tolerant species such as Chironomus plumosus, which shows that the reservoir was polluted, probably due to anthropogenic influence on the water quality. Anthropogenic activities need to be curtailed to improve the water condition for both aquatic biota and humans.