Purpose Mental Health First Aid (MHFA), an early intervention training program for general audiences, has been promoted as a means for improving population‐level behavioral health (BH) in rural communities by encouraging treatment‐seeking. This study examined MHFA's appropriateness and impacts in rural contexts. Methods We used a mixed‐methods approach to study MHFA trainings conducted from November 2012 through September 2013 in rural communities across the country. Data Sources: (a) posttraining questionnaires completed by 44,273 MHFA participants at 2,651 rural and urban trainings in 50 US states; (b) administrative data on these trainings; and (c) interviews with 16 key informants who had taught, sponsored, or participated in rural MHFA. Measure of Rurality: Rural‐Urban Commuting Area Codes. Analyses: Chi‐square tests were conducted on questionnaire data. Structural, descriptive, and pattern coding techniques were used to analyze interview data. Findings MHFA appears aligned with some key rural needs. MHFA may help to reduce unmet need for BH treatment in rural communities by raising awareness of BH issues and mitigating stigma, thereby promoting appropriate treatment‐seeking. However, rural infrastructure deficits may limit some communities’ ability to meet new demand generated by MHFA. MHFA may help motivate rural communities to develop initiatives for strengthening infrastructure, but additional tools and consultation may be needed. Conclusions This study provides preliminary evidence that MHFA holds promise for improving rural BH. MHFA alone cannot compensate for weaknesses in rural BH infrastructure.