Walia ibex (Capra walie) is an endemic and endangered species restricted to Simien Mountains National Park (SMNP). The population of walia ibex appeared to have gradually increased during the decade before our study. Our goal was to determine the current population status of walia ibex in SMNP. We conducted censuses throughout 2009 to 2011 to study population size, structure, and distribution of individuals.We stratified the Park using habitat features into eight different census sites, and a simultaneous total count was used to estimate the population size of walia ibex.