One-third of global food production is wasted, leading to environmental, health, social, and economic challenges. Food waste in landfills generates methane, which is 21 times more dangerous than carbon dioxide, thereby contributing to greenhouse gas (GHG) emissions and accelerating climate change. Asia, home to 60% of the world’s population, bears a significant burden, threatening progress toward Sustainable Development Goal (SDG) 12.3. However, research on the household food waste determinants in this region remains fragmented. This scoping review explores the determinants of household food waste in Asian countries. Following the PRISMA-ScR Guidelines, a comprehensive search was conducted across four databases, including PubMed, Scopus, Cochrane Library, and Web of Science from October 6 to 10, 2024. Data extraction was performed using Rayyan software. A narrative synthesis was conducted to summarize the characteristics of 25 studies from 14 countries in Asia. Studies on household food waste continue to grow annually. Household food waste is influenced by geographic characteristics, household size, and economic status. Shopping habits, including shopping frequency, grocery planning, susceptibility to promotional offers, and shopping location, also play a role in driving food waste. Furthermore, food consumption management, cooking skills, and eating habits were identified as determinants. Understanding these determinants is essential for developing sustainable solutions at the final stages of the supply chain, contributing to environmental sustainability and the achievement of SDGs.