Background: Family planning, enhancing mother and child health outcomes, and promoting sustainable development objectives all depend heavily on the use of contraceptives. Objectives: This study investigates the factors affecting contraceptive use among married women attending primary health care centers in Mosul city. Methods: A sample of 204 participants was selected, with data collected through face-to-face interviews to ensure unbiased responses. Results: The demographic analysis revealed that the majority of participants were aged 30-39 years (49.5%) and had attained higher education, with 53.4% being university graduates. The findings indicated that 51.0% of the women reported using contraceptives. The study emphasizes the critical role of family planning in preventing unintended pregnancies, promoting women's health, and reducing maternal and newborn mortality. Conclusions: By identifying the socio-demographic characteristics associated with contraceptive use, this research aims to inform public health strategies and improve access to reproductive health services in the region. The results align with existing literature on the importance of education and socio-economic status in influencing contraceptive practices, highlighting the need for targeted interventions to enhance family planning services in Mosul and similar contexts.