Abstract Background The rising prevalence of type 2 diabetes mellitus (T2DM) and its detrimental effects on population health make it an urgent public health concern. Maintaining blood glucose control is crucial for avoiding complications; however, there are notable socioeconomic disparities in disease management, especially in low- and middle-income settings. We aimed to examine the factors associated with controlled fasting capillary glucose in a difficult-to-access rural setting of Esmeraldas, Ecuador, and to examine the role of social support in this context. Methods Between October 2020 and May 2022, we conducted a cross-sectional study of T2DM adult patients in Esmeraldas’ Eloy Alfaro health district. We collected data on socio-demographic and clinical patient characteristics using a questionnaire and measured Fasting Capillary Blood Glucose levels. We estimated the prevalence of controlled glycaemia and used logistic regression to calculate odds ratios (OR) with 95% confidence intervals. Results Only 18.1% (95%CI: 14.9-21.8) of the 476 study participants had controlled glucose levels, with a significantly higher percentage in men (28.2%) compared to women (13.8%). Participants reported moderate perceived social support (median=2.33, on a scale of 1 to 4), without significant impact on glycaemic control. Women in urbanised areas were more likely to have controlled glucose levels compared to those in rural areas (aOR=2.34, 95%CI: 1.23-4.44) after adjusting for family support. In contrast, unemployed and older men had non-significant trends towards better odds of achieving controlled fasting glycaemia. Conclusions The complex interplay of factors affecting diabetes management and glycaemic control highlights the need for targeted, context and gender-specific public health strategies to address diabetes disparities in vulnerable populations. Key messages • The majority of individuals with T2DM residing in the remote communities of Eloy Alfaro district in Esmeraldas (Ecuador) have uncontrolled glycaemia, showing notable gender-specific disparities. • Participants reported a moderate level of social support, with family as the most important source. Yet, this perceived support may not effectively overcome contextual barriers in T2DM management.