Introduction. Periconceptional use of folic acid supplementation is an evidence-based measure of prevention of congenital malformations. There are no population-based data on women's adherence to these recommendations in Russia. Aim — to assess the compliance of pregnant women to the periconceptional usage of folic acid and to investigate associated socio-demographic factors. Material and methods. A registry-based study was conducted using data from The Arkhangelsk County Birth Registry for 2012—2015. The study population included 57 084 pregnancy outcomes to calculate the proportion of women taking folic acid and 53 340 pregnancy outcomes without missing data to analyze socio-demographic characteristics: age, marital status, education, parity, history of previous pregnancies. Multiple logistic regression was implemented to analyze data. Data were analyzed with SPSS software version 23.0. Results. The proportion of women who use folic acid supplementation before pregnancy was 1.3%, during pregnancy — 55.8%. Primiparous married women with higher education, aged 30 or more, had a higher compliance to folic acid intake before and during pregnancy. First pregnancy had the highest influence on the compliance. The history of spontaneous abortion in the mother’s anamnesis and the first pregnancy were negatively associated with the probability of folic acid intake both before and during pregnancy. Conclusions. The compliance to periconceptional intake of folic acid among women in the Arkhangelsk region was low. A level of compliance was associated with such socio-demographic factors as age, education, marital status, gravidity and parity.