This study examined the distribution of the groups classified by blood triglyceride (TG) levels according to the general characteristics and health and dietary behaviors with data from the Seventh (2018) KNHANES. The groups were divided into moderate, border, high, and very high groups based on the blood TG levels. Females showed a higher ratio of the moderate group than males and the ratio of the moderate group increased with age (p<0.001). The distribution of the groups showed significant variations in the females by education level (p<0.001) and in the males by subjective health status (p<0.05). The ratio of the moderate group decreased in males with an increase of smoking and drinking frequencies but increased in female with an increase of drinking frequencies (p<0.001). Obese people with higher BMI and waist circumference exhibited higher blood TG levels (p<0.001). Cereal and grain, vegetable, fruits and meat groups were not significant sources to differentiate the blood TG levels. The distribution of the groups showed significant variations in males and females by breakfast frequency (p<0.001) and in females by lunch (p<0.05) and eating out (p<0.001) frequencies. Our study indicates that blood TG level is closely related to general characteristics, health behavior including obesity, and dietary behavior. Effective nutritional education and health project should be continued to reduce obesity and smoking by improving people’s health and dietary behavior.