The traditional community was vulnerable to food insecurity and undernutrition due to limited access to health services, infrastructure, and socioeconomic status. Therefore this study tried to assess the nutritional status and diet patterns of people in the Arfak Mountains Manokwari West Papua Province. This research was done using a cross-sectional method. Assessment of nutritional status was based on body mass index for age (BMI/A). The type and frequency of food were obtained through interviews using the Food Frequency Questionnaire with modification. The association of food patterns and nutritional status were analysed using the Pearson chi-square test. The age of respondents for children ranged from 6-18 years, and adults ranged from 19-60 years with the total subjects 225 people. The results showed that the overnutrition of children (10.49% obesity and 12.35% overweight) was higher than undernutrition (7.41% thinness). In adults, we also found that overnutrition (12.70% overweight and 33.33% obese) was higher than undernutrition (3.17% wasting). Based on the type and frequency of food, rice (25.55%) and tuber (41.62%) were the most nutritious source of carbohydrates, 66.54% of animal protein, and 70.97% of vegetable protein. Chayote leaves, watercress, dutch eggplant, and passion fruit were the more often consumed vegetables and fruits. Based on diet patterns, 56.89% of the community has a poor diet and only 43.11% have a good diet. The pattern of food consumption of Arfak people did not show a significant effect on their nutritional status (p-value < 0.05). Although most people in the Arfak mountains tend to be over nutrition, their diet pattern shows food insecurity because of the low food frequency.