The purpose of this study was to identify risk factors for type 2 diabetes (T2D) in Korean adults. The data were divided into two types of variables ((i) socioeconomic and demographic factors and (ii) behavioral risk factors) using data obtained through the Korea National Health and Nutrition Examination Survey (2014). Multiple logistic regression analyses were performed to identify risk factors for T2D; the analysis was performed in three steps: socioeconomic and demographic factors (model 1), behavior risk factors (model 2), and socioeconomic, demographic factors and behavior risk factors (model 3). Model 3 revealed that being older (odds ratio, OR 6.58 (95% confidence interval, CI=3.77~11.50) 40~59 years old, OR 14.31 (95% CI=7.96~25.73) ≥60 years old, respectively), lower income (OR 1.50 (95% CI=1.13~ 2.00)), smoking in the past (OR 2.02 (95% CI=1.59~2.57)), abdominal obesity (OR 1.97 (95% CI=1.48~2.64)), having a family history of T2D (OR 2.80 (95% CI=2.12~3.70)), or having a co-morbid condition (OR 4.82 (95% CI=3.08~ 7.55)) increased the risk of T2D. The interaction of waist circumference and co-morbidity significantly increased the risk of T2D. The OR for the interaction of WC and co-morbidity for T2D compared to normal subjects and those without comorbidities were 9.99 ((95% CI=6.63~15.05) normal person and having comorbidity), 2.56 ((95% CI=1.95~3.35) abdominal obesity and no comorbidity), 9.58 ((95% CI=6.42~14.28) abdominal obesity and having comorbidity).