PURPOSE: This study was conducted to identify the pattern and factors associated with women's use of complementary and alternative medicine (CAM) during postpartum in Korea. METHODS: With a descriptive survey design, data of 423 postpartum women were collected via online and offline surveys. RESULTS: A total of 251 women (59.3%) reported CAM use during postpartum. Eating animal-based foods (65.3%), plant-based health foods (52.2%), and using oriental medicine (31.8%) were commonly used in postpartum women. The reason for using CAM were physical recovery (39.1%), breastfeeding (29.7%), weight loss (24.8%), prevention of postpartum complications (5.1%), and others (1.3%). People who recommended CAM use was mainly family (41.3%), and expense of using CAM was 751,188 Korea won. Most women discussed CAM use with doctor (44.9%), and 29.3% of women didn't even consult CAM use with health care providers. Most of (72.3%) women were satisfied with CAM use. Higher level of education and monthly income, being employed, primipara, normal range of gestational weight gain, no abortion experience, and no maternal complication were significantly associated with CAM use in postpartum women. CONCLUSION: Results of this study were somewhat different from those of western research. Findings offer baseline data of CAM use in postpartum women, and health care providers need to understand it when they care for them.