In Lagos State, Nigeria, access to reliable, accurate and complete family planning information is crucial for women’s reproductive health and autonomy. Currently the country has a low contraceptive rate of 17% for any method and 12% among married women. Understanding women’s attitudes, behaviour, self-efficacy and perception of family planning messages is important in achieving SDG 3.7. This chapter investigates the role of various information sources in shaping the efficacy of family planning messaging among women in Lagos State. The chapter adopts a descriptive survey research design. A total of 400 respondents, eight in-depth interviewees and four service providers helped gained insights across selected urban and rural local governments across Lagos State. Findings reveal that respondents averagely access family planning information from interpersonal sources—health centres and word of mouth—followed by new media and social media. In addition, a majority of women adopt a method based on messages that emphasise better quality of life and family health.