Objective: Given the high rates of poverty observed among sexual minority groups and their social vulnerability, we examined the prevalence and correlation of food hardship, measured as food insecurity, receipt of free or reduced-cost food, and Supplemental Nutrition Assistance Program (SNAP) participation among low-income sexual minority and heterosexual adults using population-level health surveillance data. Methods: We used 4 waves of pooled data (2011-2019) from the National Survey of Family Growth for adults aged 18-44 years. We compared the sexual orientation subgroups and used logistic regression to predict the likelihood of food hardship. Results: Among men, gay and bisexual men had higher odds of experiencing food insecurity than their heterosexual counterparts (adjusted odds ratio [aOR] = 1.97 and 1.83, respectively). Compared with heterosexual men, bisexual men had significantly higher odds of receiving free or reduced-cost food, but gay men did not. The odds of participating in SNAP did not differ significantly among gay, bisexual, and heterosexual men. Among women, only bisexual women were more prone to experiencing food insecurity than their heterosexual counterparts (aOR = 1.81). The odds of receiving free or reduced-cost food did not differ significantly among heterosexual, bisexual, and lesbian women. However, compared with heterosexual women, lesbian women had significantly lower odds (aOR = 0.62) and bisexual women had significantly higher odds (aOR = 1.24) of participating in SNAP. Conclusion: Our findings contribute to the limited literature examining trends in food hardship among sexual minority groups and suggest potentially different patterns of food insecurity, food assistance, and SNAP participation among sexual orientation subgroups, which may call for group-specific, nuanced approaches for lessening food hardship. [ABSTRACT FROM AUTHOR]