Abstract. Low back pain (LBP) is a common thing that happen in the population. Interestingly, for women, LBP generally occurs for the firsttime during pregnancy. Reported approximately 60% of pregnant women experience LBP at various levels. Although the frequency of LBP in pregnancy is relatively high, the exact data on the prevalence of LBP in pregnancy is still limited. Identification of risk factors and the effectiveness of interventions has not been widely reported. This study aimed to identify the prevalence, characteristics, and risk factors for LBP in pregnant women. This research was a cross sectional study using structured interview and physical examination to build diagnosis and define risk factors in pregnant patient in all trimester. The risk factors obtained statistically significant (p < 0.05) were the previous history of LBP, either while pregnant or not pregnant (PR 8,786, CI 2,747-28,095), occupation at risk (PR 5,057, CI 1,821-14,046), lack of physical activity (PR 3,958, CI 1,554-10,084), as well as vacation habit (PR 3,091, CI 1,246-7,669). After a multivariate analysis, vacation habit was no longer defined as significant risk factor (p=0.379). The knowledge about the risk factors is expected to be beneficial to help clinicians determine appropriate interventions to prevent and manage LBP in pregnancy.