Background: Family Planning (FP) is a main point to control growth of population and promoting maternal and child health through providing adequate space between children as well as preventing unwanted pregnancy. Aim of the study was to: Assess family planning Knowledge among premarital females at Assuit City. Research design: This study was conducted using a descriptive research design Setting: Maternal Child Health Centers were used to conduct this study at Assuit city (Kholta MCH and firyal MCH). Sample: A convenience sample of 350 available premarital females. Data collection: An interview questionnaire was used to gather data, which was divided into two parts: Part 1: This personal data for the participant's socio demographic details includes (age, residence, level of education, and occupation) Part 2: Included (27) questions to assess Knowledge of family planning. Results: Current research findings cleared which exceeds three quarters (81.7%) of females their total knowledge level was poor. Conclusion: Current research findings cleared which exceeds three quarters of the premarital females their total knowledge level was poor .Also the majority of females wanted to learn about family planning methods Recommendations: Use media channels and TV shows to increase awareness regarding family planning methods for both couples of family planning. Establish conferences and seminars that encourage people to plan their families.