Background . Anemia is an extremely common problem in the elderly, and next to anemia of chronic disease, iron deficiency is the most common cause. Iron-deficiency anemia is important to diagnose because appropriate iron therapy may improve symptoms, inappropriate iron therapy may cause clinically important side effects, and iron deficiency may be a marker for occult gastrointestinal pathology, despite its high prevalence anemia often does not receive proper clinical attention, and detection, evaluation, and management of iron deficiency anemia and iron-restricted erythropoiesis can possibly be an unmet medical need especially the elderly. A multidisciplinary panel of clinicians with expertise in anemia management convened and reviewed recent published data on prevalence, etiology, and health in the elderly implications of anemia as well as current therapeutic options and available guidelines on management of anemia across various patient populations and made recommendations on the detection, diagnostic approach, and management of anemia . Aim of the study: To Assessment Knowledge about Anaemia among elderly patients attending at Primary Health Care, in Saudi Arabia 2022 Methods: across-sectional study was conducted in primary healthcare centers among elderly patients attending at Primary Health Care who visited clinic for routine follow-up were selected through convenience sampling technique. A questionnaire filled out by the researcher through an interview with the elderly patients was utilized for data collection. Results: most of the participants (47.0%) were in the age group < 65 years follow by the (33.0%) the gender the majority of participant male were (51.0%), marital status the majority of participant Single were (58.0%) while married were(30.0%), educational level the majority of participant are primary education were(29.0%), nationality the majority of participant are Non-Saudi were(55.0%), economic level the majority of participant <10.000 were (67.0%). Conclusion. In a general geriatric medical population such as ours, with a prevalence of iron deficiency of 36%, appropriate use of serum ferritin determination would establish or refute a diagnosis of iron deficiency without a bone marrow aspiration in 70% of the patients. Anemia is highly prevalent in adolescents, adults, and the elderly in Makkah region. ­e most common cause is thought to be iron decency, although other causes are not uncommon. ­e authorities need to address the problem of prevention and reduction in anemia prevalence by taking elective measures and interventions in geriatric.