This study examined male involvement in birth preparedness and complication readiness across selected Local Government Areas in Lagos State, Nigeria. It focused on demographic characteristics, the extent of male participation, and the sociodemographic factors influencing their engagement. A cross-sectional descriptive design was utilized, and data were collected from 124 respondents using a structured questionnaire. Analysis was performed using SPSS version 25 and Microsoft Excel 2016, incorporating both descriptive statistics (frequencies and percentages) and inferential statistics (Chi-square tests) to explore associations between variables. Results showed that the majority of respondents (75.8%) were aged 21–30 years, predominantly Yoruba (66.1%) and Christian (73.4%), with a high level of education (91.9% held tertiary qualifications). A significant proportion of men demonstrated active involvement in birth preparedness: 82.3% participated in decision-making, and 83.1% acknowledged the importance of prenatal check-ups. Socio-demographic factors such as financial capacity, educational attainment, and occupational demands were found to significantly influence male involvement. Financial limitations emerged as a major barrier, with 75% of respondents reporting that inadequate resources hindered effective birth preparedness. Although cultural and religious barriers were less prominent, 33.9% of respondents identified unfriendly hospital environments as a deterrent to full participation. The study concluded that male involvement plays a pivotal role in improving maternal health outcomes. However, challenges including financial constraints, job-related limitations, and unwelcoming healthcare settings must be addressed. Recommendations include targeted health education for men, the establishment of male-friendly antenatal services, and the adoption of workplace policies that support paternal engagement in maternal care. Further research should explore context-specific interventions aimed at enhancing male participation in maternal health across diverse socio-economic and cultural settings.