Introduction : Noncommunicable diseases (NCDs) caused at least 43 million deaths in 2021, equivalent to 75% of non-pandemic-related deaths globally. Cardiovascular diseases account for most NCD deaths, or at least 19 million deaths in 2021, followed by cancers (10 million), chronic respiratory diseases (4 million), and diabetes (over 2 million including kidney disease deaths caused by diabetes). These four groups of diseases account for 80% of all premature NCD deaths. According to the Fourth National Survey on the Prevalence of Noncommunicable Diseases, Injuries, and Their Risk Factors: 14.0% of adults aged 15–69 have experienced a heart attack or stroke, 11.0% report taking aspirin to prevent or manage cardiovascular disease (CVD), 2.2% use lipid-lowering medications (statins) for CVD prevention or treatment, among adults aged 40–69, 19.3% are at high risk of developing CVD within the next 10 years. These findings underscore the urgent need to strengthen cardiovascular disease prevention efforts and improve the management of key risk factors in Mongolia. Goal: To determine the population’s knowledge, attitudes, and practices related to cardiovascular disease risk factors and healthy lifestyle behaviors. Materials and Methods: This descriptive cross-sectional study included 2,532 participants aged 18–69 years from all 21 provinces of Mongolia and Ulaanbaatar city, as part of the “Cardiology, Cardiac Surgery, and Telemedicine in Mongolia” (MON/007) Project. Data were collected using a structured questionnaire comprising six sub-sections, designed to assess knowledge, attitudes, and practices related to 10 modifiable cardiovascular risk factors. Ethical approval was obtained prior to the study, and data were analyzed using SPSS version 23. Results: Thirty-three percent of study participants reported having no knowledge of cardiovascular disease, indicating that roughly one in three adults consider themselves to have little or no understanding of cardiovascular health. In the study, 53.0% of participants reported being unaware of the symptoms of a heart attack, while 42.0% did not recognize the symptoms of a stroke. Among participants who could identify these symptoms, 68.0% indicated dizziness as a sign of hypertension, 65.0% reported headache, and 58.0% noted blurred vision. Among the respondents, 31.0% knew that the normal arterial blood pressure for an adult is 120/80 mmHg, 57.0% were aware that an adult should sleep 7–8 hours per day, 13.0% knew about body mass index (BMI), 30.0% were aware of fasting blood glucose levels, and 44.0% recognized that adults should engage in 30 minutes of physical activity daily. Knowledge of key physiological indicators was significantly associated with educational attainment, gender, and age group, with lower levels of awareness observed among participants with lower education, males, and younger adults (p=0.001). The majority of participants (75.0%-96.0%) reported being aware of the modifiable risk factors for cardiovascular disease. Among the study participants, nine out of ten agreed that maintaining a healthy lifestyle includes regular physical activity, exercising, walking short distances, and understanding that hypertension is harmful and smoking adversely affects the heart. Furthermore, 80–85% reported avoiding excessive alcohol consumption, and 79% believed that cardiovascular disease is preventable. To prevent or reduce obesity, a risk factor for cardiovascular disease, 49.0% of participants reported engaging in regular physical activity, while 33.0% reported following a healthy diet. Among all study participants, 61.0% had never checked their cholesterol levels, 49.0% had never measured their blood glucose, and 15.0% had never monitored their blood pressure. Among respondents exhibiting 1–3 common risk factors, the majority were female, aged 25–34 years, living in rural areas or ger districts, with secondary or specialized secondary education, employed in government institutions, and had a normal BMI. In contrast, among those with 7 or more common risk factors, the majority were male, aged 35–44 years, residing in Ulaanbaatar, living in ger districts, and employed in private organizations. Conclusion Most of surveyed participants had sufficient knowledge and positive attitudes toward modifiable risk factors for cardiovascular diseases (p=0.001). However, they exhibited inadequate preventive practices related to these risk factors. This indicates the importance of targeted intervention on behavior change to address this gap.