Objectives: To assess available food insecurity (FI) classification (ranked as secure, mild, moderate and severe) approaches used to personalize the Food Insecurity Experience Scale (FIES) and select a method most consistent with the population Food and Agriculture Organization (FAO)-FI measure, so as to explore FI status in Taiwan for individuals. Methods: From the 2019 Nutrition and Health Survey in Taiwan (NAHSIT), 2266 participants ≥16 years who had completed the FIES (ranges 0-8) were recruited. To choose the best FIES classification fit, FIs derived by various cuts were weighted and adjusted for design effect by SUDAAN and compared with the FAO-FI. The associations between the chosen FI and socio-demographic data were explored further by ordinal logistic regression. Results: In 2019, the "moderate and severe" and "severe" FI prevalences in Taiwan were 2.29% and 0.44%, respectively. The cut-off proposed by Ganhao-Arranhado was most consistent with FAO-FI. The risk for FI was high for 16-40-year-olds; junior high school educated; junior college or university students; where self-perceived economic status was difficult; and where there was any betel nut chewing. However, with occasional smoking there was a lower risk. After adjustment for locality, housing instability became a significant risk factor for FI. Conclusions: Food security status, assessed as FIES in Taiwan, improved from 2014 to 2019. FI was associated with a range of potentially modifiable risk factors.