Background: Although, evidence from several studies has shown that the majority of maternal and perinatal deaths and complications could be prevented by use of partograph, its use remains poor in the sub-Saharan African countries and other developing countries. Aim: This study aimed to assess the knowledge and utilization of partograph among primary healthcare workers in Sokoto metropolis, Nigeria. Materials and Methods: A cross-sectional study was conducted among 239 health workers (selected by a 2-stage sampling technique) working at the maternity units of the Primary Healthcare Centers (PHCs) in Sokoto metropolis, Nigeria. A set of semi-structured self-administered questionnaire was used to obtain data on the research variables. Data were analyzed using the IBM SPSS version 20 statistical computer software package. Results: A larger proportion, 103 (43.1%) of the 239 respondents were community health extension workers (CHEWs). Most of them (80.3%) knew that partograph is a graphical representation of the events in labour, but only about half (55.2%) knew that it contains 3 components, and only about half to two-thirds of respondents knew the usefulness of the information contained in the various components of the partograph. Only about a fifth of respondents (22.2%) have ever used partograph to monitor women in labour, and the most commonly cited barrier to its use was unavailability (65.6%). Conclusion: This study showed sub-optimal knowledge and poor utilization of partograph among primary healthcare workers in Sokoto metropolis, Nigeria. The state government should recruit sufficient number of qualified personnel to run the maternity units of the PHCs in the state, while the management of the respective hospitals should periodically train their staff on the use of partograph and ensure its constant supply in their maternity units.