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This study aimed to identify the association between sitting time and orthopedic conditions in Korean older adults. Data from adults aged ≥65 years from the 6th Korea National Health and Nutrition Examination Survey (2014–2015) were used for analysis (n = 3,011). Sitting time ≥7.5 h/day was significantly associated with knee joint (OR = 1.41, 95% CI: 1.11, 1.79), hip joint (OR = 1.54, 95% CI: 1.17, 2.03), and low back pain (OR = 1.44, 95% CI: 1.19, 1.74) when adjusted for sex, age, obesity, housing type, family income, education, and marital status in multiple logistic regression analyses. These findings imply that appropriate pain management according to sociodemographic characteristics in orthopedic conditions are necessary to reduce excessive sitting time in Korean older adults.