Abstract: Background and Objectives: Refuse dump site (RDS) are considered refugia for a myriad of medical and ecological important micro-faunae. A survey of selected refuse dump sites was conducted in Umuahia metropolis to determine the prevalence and effect of macro-faunae. Materials and Methods: Two RDS were selected from Ibeku and Umuahia main in Umuahia North and from Olokoro and Aba road in Umuahia South Local Government Areas (LGAs) of Abia State, South east Nigeria. Different methods were adopted to collect samples namely: handpicking, water and net traps. Collected samples were identified in the Laboratory of Zoology and Environmental Biology, Michael Okpara University of Agriculture, Umudike after sorting by means of a hand lens, pictures and a taxonomic key and their abundance determined. Paired sample t-test was used to compare species population of the two LGAs. Results: Six families (Muscidae, Culicidae, Blattidae, Lumbricidae, Blattellidae and Chironomidae) were recorded. Musca domestica (50.8%) was the most abundant species of the total (81) organisms caught while the least was Lumbriscus terrestris (2.4%). Water traps captured the highest (55.5%) number of the organisms irrespective of species and location whereas handpicking caught 2.4%. More macrofaunae were caught in Umuahia North (45) compared to Umuahia South (36) but were not significantly (p>0.05) different. To elicit data on public health and methods of waste disposal, 100 copies of structured questionnaires (i.e., 25 copies/LGA) were distributed to the residents around the dumpsites visited. Statistical descriptive method was applied to generate data on frequency, percentages and means. Conclusion: The predominance of houseflies and mosquitoes in the RDS appear to be the reasons for high prevalence of vector-borne diseases in the metropolis.