Despite the affords by FGN and WHO to make available effective vaccine against this tetanus in Nigeria, maternal mortality especially among the pregnant women within the age bracket 15 – 49 years still remains major health problem in Nigeria across the six geo-political zones. Hence, the study aims to determine the level of geographical healthcare utilization variations among pregnant women receiving anti-tetanus injection in Nigeria according to zones. Method and data: The study adopted cross-sectional data sourced from the Nigeria Demographic and Health Survey (NDHS, 2020) with representative sample of approximately 42,000 households. The target groups were women age 15-49 in randomly selected households across Nigeria. The study adopted descriptive statistics and Concentration Index in investigating the Geographical Variations in healthcare utilization among Pregnant Women in Nigeria with emphasis on antitetanus injection. Results: The study revealed that that there is a wide margin health care utilization among pregnant women with respect to anti-tetanus injections across the geopolitical zones in Nigeria with Northern West and Southern East marking the least and the most healthcare utilizers respectively. The differences recorded in utilization of the various anti-tetanus injections across zones are given as 51.3%, 46.6%, 38.3%, 84.1, 67.8 and 66.4% for NC, NE, NW, SE, SS and SW respectively. Conclusions: The study concludes that variation in utilization of anti-tetanus injections by pregnant women across the six geo-political zones of Nigeria could be as a result of different socioeconomic, cultural and religious practices in these six geo-political zones in Nigeria. This conclusion is reached as a result of observed differences in utilization of the various anti-tetanus injections/ maternal healthcare services across the country by pregnant women.