Intestinal parasites infections are common in the state of Bahrain, but the incidence is decreasing due to improvement in health and social standards. A community-based study sample of all population of Bahrain was done including all ages and nationalities. From 1st July 1984 to 28th February 1986, the first community-based study sample of all population of Bahrain was done including all ages and nationalities. A total number of 2123, about 0.006 of the population of 1981 census was chosen for the study. The study shown that 739 persons were infected with intestinal protozoa and helminths. The figure representing 34.8% of total sample size, whom 283 persons were symptomatic, about 38.3% of total infected sample size. Giardia lamblia and Trichuris trichuria were the most common parasites among the infected persons.