The research investigates the influence of demographic variables on consumer buying Behaviour towards green cosmetic products, focusing specifically on the rising trend of eco-friendly alternatives within the cosmetics sector. Green cosmetics, widely perceived as environmentally sustainable and health-conscious choices, are becoming increasingly popular among consumers. These products typically feature natural ingredients, biodegradable packaging, and minimal use of harmful chemicals, aligning with the growing global emphasis on sustainability and personal well-being. This study specifically examines how demographic variables such as age, gender, education level, occupation, income, and marital status shape consumer preferences and purchasing decisions regarding green cosmetics. The research was conducted in Agra, India—a rapidly urbanizing city where awareness about environmental issues and health consciousness is notably increasing among consumers. Data collection involved structured questionnaires administered to 600 women consumers across diverse demographic segments in Agra. The questionnaire gathered detailed information about respondents' demographic profiles, their preferences for green cosmetic products, their awareness of environmental and health risks associated with conventional cosmetics, and factors influencing their purchasing decisions. The findings from this study highlight significant variations in consumer Behaviour based on demographic characteristics. Age emerged as a critical factor influencing preferences for green cosmetics. Younger consumers (below 25 years) demonstrated strong preferences for products offering skin health benefits such as acne prevention, protection from UV rays, and avoidance of harmful chemicals. Middle-aged consumers (25-40 years) exhibited balanced preferences between skincare benefits and beauty enhancement features. In contrast, older consumers (40-55 years) predominantly prioritized products that enhance appearance and reduce visible signs of aging. In conclusion, understanding how demographic factors shape consumer Behaviour is crucial for effectively positioning green cosmetic products within competitive markets like Agra's rapidly urbanizing environment. As consumer awareness about environmental sustainability continues rising globally—including within India's expanding middle-class segment—green cosmetics are expected to become increasingly mainstream choices among diverse consumer groups.