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Food insecurity (FI) is a significant public health issue affecting disadvantaged groups, including migrants and refugees in high-income countries (HICs). FI is associated with increased risk of mortality, coronary heart disease, type 2 diabetes, and some cancers. Despite its impacts, a comprehensive synthesis of the overall weighted pooled prevalence of FI among migrants and refugees in HICs is still lacking. This systematic review and meta-analysis aimed to estimate the pooled prevalence of FI across different migratory groups in HICs. We searched Scopus, Embase, PsycINFO, Medline, and Web of Science for eligible studies published from January 1, 2008 (selected to capture the post-global financial crisis period, when migration patterns changed sharply) to December 16, 2025. Three reviewers independently screened and selected studies, extracted data, and assessed methodological quality. The ‘meta prop’ command in STATA was used to estimate the weighted pooled prevalence of FI among migrants and refugees in high-income countries (HICs). Given the significant heterogeneity among studies (I² > 50%), a random-effects model was used to account for between-study heterogeneity. Additionally, the ‘meta-preg’ command and the likelihood ratio test in Stata were used to examine interactions among gender, region, and FI measurements by publication year. From an initial pool of 758 records, 34 studies met the inclusion criteria. The weighted pooled prevalence of FI among migrants and refugees in HICs was 25.2% (95% CI: 24.3–26.1), indicating that approximately one in four migrants/refugees in high-income countries lacked reliable access to adequate food. The weighted pooled prevalence of FI reported was higher among females (52.7%) than males (46.9%), and scale measures were higher than the rapid measures (34.2% vs. 31.2%). Significant variations were observed across regions. The highest weighted pooled prevalence of FI was found in Europe (60.1%), as opposed to North America (13.8%), the Middle East and North Africa (MENA) region (13.8%), and Oceania (13.3%). The Likelihood Ratio test statistic indicated that FI prevalence varied significantly by gender, region, and FI measurements. Our study shows that one in four migrants or refugees in high-income countries faced FI, particularly among females. The issue is significantly greater in Europe than in other regions. Our findings emphasise the need for global standardisation of FI measurements and for the implementation of targeted interventions and policies to address gender and region-based disparities. These efforts are crucial for promoting equitable food security worldwide. By pursuing more equitable and inclusive strategies, for example, strengthening support for refugees in high-FI regions like Europe and empowering migrant women through targeted programs (e.g., childcare, wage equity, and culturally tailored food supports), stakeholders can improve food security for migrants and refugees worldwide, contributing to global goals of ending hunger and reducing inequalities.