Parasitic diseases including amoebiasis, blastocystosis, giardiasis, trichomoniasis, and schistosomiasis, are all globally wide spread with harmful consequences. The present study was carried out to provide information of the prevalence of these diseases in some regions of Baghdad. Objectives: to detect the prevalence of human pathogenic parasites in some regions of Baghdad in stool samples and urine samples, and to determine the most common age group affected. Methods: Data were collected from Al-Kindy Teaching Hospital and Medical City Teaching Hospital, in the lab of parasitology from November 2018 to May 2019. The present study included (400) sample, which were collected from patients at different ages of both genders, samples of the study were selected randomly, divided them into equal number of stool samples and urine samples. Results: The results of epidemiological study showed that the total number infected with Entamoeba Histolytica parasite was (168) positive samples with total percentage of (84%) in both of Al-Kindy Teaching Hospital and Medical City Teaching Hospital with a percentage of (100%,and 68%) respectively, followed by Blastocystis Hominis with total number of (22) positive samples and a percentage of (11%), and then Giardia lamblia with total number of (10) positive samples and a percentage of (5%). Males showed higher number and percentage of infection with E. histolytica, (97) case with percentage of (48.5%), while females were (71) case with percentage of (35.5%), while number and percentage of infection with B. hominis in males were (17) case with percentage of (8.5%), and females were (5) case with percentage of (2.5%), finally number and percentage of infection with G. lamblia in male (5) case with percentage of (2.5%), equal females were (5) case with percentage of (2.5%). The highest percentage of infection occurred among age group (20-29) years with percentage of (36%), while the lowest percentage of infection occurred among age group (1-9) years, and age group (60-69) years with percentage (1%), were detected in Medical City Teaching Hospital. Urine examination showed there were no parasites in urine samples. In conclusions Entamoeba Histolytica was the most prevalent parasite in our study, followed by Blastocystis Hominis, while Giardia lambilia was the least prevalent one. Also males were more affected than females to parasitic infections, and the most common age group affected was (20-29) years. While urine examination showed there were no parasitic infections in our study. The current study recommend using permanent stains, also making more studies including increasing in number of samples.