Introduction: Anemia in pregnancy contributed to high maternal and infant mortality and morbidity rate and increased the risk of Low Weight Baby Born. This study was carried out to determine the factors associated with anemia among pregnant women in Gresik. Methods: This study was an analytical type of observational study with a cross-sectional design. The sampling was used to take 282 pregnant women who attended antenatal care (ANC) at the community health centre in Gresik from August-September 2021. Data were analyzed by Chi-square with a significance level of = 0,05 as bivariate and binary logistic regression as multivariate. Data were analyzed by chi-square test with p>0,05 and logistic regression. Result: The prevalence of anaemia in pregnant women found in this study was 41,5%. Analysis bivariate result showed pvalue on gestational age, education, and work were 0,000; 0,002; 0,011. Logistic regression analysis showed that gestational age (OR = 7,814; 95% CI 4,121 to 12,400; p = 0,000) was the most dominant variable. Conclusion: Factors associated with anaemia among pregnant women in Gresik were gestational age, education, and work. Gestational age was the most dominant variable.