Background: Lack of male involvement in family planning (FP) has been highlighted as one of the factors responsible for the low contraceptive prevalence rate in Nigeria. Male involvement in family planning can lead to contraceptive uptake and enhance the effective and continued use of contraceptive methods. Aim: This study aimed to assess male involvement in FP and determine the factors influencing male involvement in FP in Sokoto metropolis, Nigeria. Materials and Methods: It was a descriptive cross-sectional study done in Sokoto metropolis in November 2017 among 177 married men selected through a multi-stage sampling technique. A structured interviewer-administered questionnaire was used. Data were analyzed using SPSS version 23. Results: The mean age of the respondents was 39.4 ± 8.8 years, 84 (50.9%) had ever used a contraceptive method, only 54 (32.7%) were current users of a contraceptive method, and 83 (50.3%) were highly involved in family planning. The factors significantly associated with male involvement in family planning were the respondents and their wives’ occupation and educational level, age of the respondents, social class, ever use, and current use of a contraceptive method. The predictors of male involvement in family planning were social class (aOR= 8.53, 95% CI= 1.82-39.90) and ever use of a contraceptive method (aOR= 20.68, 95% CI= 7.56-56.58). Conclusion: The level of male involvement in family planning established in this study is suboptimal; therefore, it is necessary to increase awareness of the need for more males to be involved in family planning.