An epidemiological study of animal giardiosis was carried out in the province of Granada. In this study, 912 samples from dogs, 592 from cows, 1165 from sheep, and 574 from goats were analyzed, obtaining prevalences of 12.09%, 0.16%, 6.26% and 4.00%, respectively. Prevalence was studied in relation to sex of host, area within the province and seasonal change; in addition, the age factor was taken into account in the case of dogs.