Anaemia in pregnancy remains a critical public health concern in many countries including Ghana and it poses severe consequences in the short to long-term for women and their unborn babies. Although antenatal care (ANC) is largely provided for pregnant women, the extent its utilisation protects against anaemia in pregnancy remains largely understudied. The study assessed the adequacy of ANC services utilisation and its effect on anaemia among pregnant women in the Wa Municipality of Ghana. A facility-based cross-sectional survey was conducted. Probability proportionate to size sampling and systematic random sampling were used to select the facilities and 353 respondents. While 80⋅2 % of the pregnant women reported having received a sufficient number of ANC services provided, the prevalence of the overall ANC adequacy was only 44⋅2 %. After adjusting for potential confounders, pregnant women who could not achieve adequate ANC attendance were 2⋅3 times more likely to be anaemic in the third trimester of gestation AOR = 2⋅26 (95 % CI 1⋅05, 4⋅89), compared to their counterparts who maintained adequate ANC attendance. Adequate ANC attendance was a consistent and significant predictor of anaemia in pregnancy in the third trimester. Health and nutrition education on the need for early initiation of ANC attendance and support for the consumption of diversified diets are two possible interventions that can help contain anaemia in pregnancy.