The share of food expenditure describes how the level of household welfare in meeting food needs. The study aims to determine household food security in the province of Central Sulawesi, Indonesia. This research was carried out in Banggai Laut Regency, Sulawesi Province by focusing on two regional conditions, namely in the mainland area with the sample area in Banggai Tengah District as the point of the mainland area and the island area, where Bangkurung District as the point of the archipelago. The sample of this research is the population who live in Bangkurung sub-district totaling 44 respondents and 44 respondents residing in the Banggai Tengah sub-district, which is carried out using a purposive sampling approach. To answer the research objectives, an analytical survey method was used, using a cross sectional study design. Food Expenditure Share Analysis shows that respondents in Banggai Laut Regency belong to the category of food insecurity