Abstract: A cross-sectional study was conducted on the presence of Cryptosporidium oocysts and Balantidium coli cysts in fecal samples from semi-intensively managed pigs in Zuru Local Government Area of Kebbi State, Nigeria between November 2005 and July, 2006. A total of 632 households with human population of 5905 were identified in seven pig- rearing locations in the study area while 105(16.6%) of these households with human population of 1105(18.7%) reared a total number of 3895 pigs. Physical randomization was used to select 50% representative samples of pig-rearing households and pigs for this study. Out of the 402 pigs from 55 households, 207(51.5%) pigs were positive for Balantidium coli cysts, 56(13.9%) for Cryptosporidium oocysts while mixed infection was observed in 29(7.2%). There is significance difference in the distribution of the two parasites in the pigs surveyed (p< 0.05). Young pigs were most affected with infection rates of 33(58.9%) Cryptosporidium oocysts, 113(54.6%) Balantidium coli cysts and 17(58.6%) mix infection. Human fecal samples collected from 53 individuals revealed 3(5.7%) positive cases of Cryptosporidium oocysts all in young ones while a positive case of Balantidium coli cyst infection was found in an adult female. Water and soil samples from two areas were also found to contain both organisms. The semi-intensive system of pig rearing which allowed pigs to scavenge and defecate about, defective personal and environmental hygiene couple with the usage of untreated pig feaces as manure on vegetable farms in the study area can enhance the spread of these zoonotic diseases in human population.