Background: Eating patterns during adolescence significantly influence long-term health outcomes. This study explores the dietary habits and associated factors among adolescents aged 14-16 years in Chengalpattu district, Tamil Nadu, India. Methods: A cross-sectional study was conducted at Shri Sai Medical College and Research Institute, involving 250 adolescents aged 14 to 16 recruited from pediatric outpatient departments, community camps, and local schools. Data were collected over 18 months using a structured Food Frequency Questionnaire (FFQ), along with anthropometric measurements and socioeconomic status assessment using the Modified Kuppuswamy scale. Statistical analysis was performed using SPSS 21, with key indicators including mean, standard deviation, and p-values. Results: Among 250 patients, the majority were 16 years old (36.4%) and male (67.2%). BMI analysis showed a higher prevalence of overweight individuals, especially among 16-year-olds, though the correlation with age was statistically insignificant (p=0.653). Socioeconomic analysis indicated that 64.4% belonged to the upper lower class. Dietary habits revealed that most patients consumed three or more servings of cereals (82.8%), but intake of pulses and legumes was low, with 59.2% having no intake. Vegetable consumption was higher, with 40.4% having three or more servings, while 44.8% of patients reported no fruit intake. Milk and milk products, as well as non vegetarian foods, were poorly consumed, with significant gender differences observed. Energy-dense snacks and beverages were widely consumed, with 69.6% and 46.8% of patients respectively having three or more servings. Water intake was similar between genders and was statistically insignificant (p=2.92).