: Diabetes mellitus (DM) is a chronic disease characterized by blood glucose levels that exceed normal values. Riskesdas in 2013 showed that North Sulawesi is one of the provinces with the highest prevalence of diabetes in Indonesia. HbA1c measurement is the most accurate way to determine blood sugar levels over the past two to three months. HbA1c is also the best single examination to assess risks to the tissue damage caused by high blood sugar levels. This study aims to determine the levels of HbA1c in patients with type 2 diabetes mellitus in Bahu Community Health Center Manado. This study is a descriptive cross sectional study. Primary data were collected through interviews, physical examination and laboratory tests. Respondents were all patients with type 2 diabetes mellitus who came in Bahu Community Health Center and willing to become respondents. The sample size is 22 people. The results of this study prove that more than half of the respondents have not controlled HbA1c levels (> 7%) of 17 respondents. Of the 17 respondents were 9 respondents have overweight body mass index, 13 respondents not take the medicine as directed by doctor and 9 respondents did not exercise regularly. It can be concluded that the blood glucose levels of patients in Bahu Community Health Center is still not controlled, by HbA1c values above 7%