ABSTRACT: The study examined Gender representation in leadership positions on diplomatic services of ministry of foreign and diaspora affairs in Nairobi Kenya. The study employed descriptive correlational research design. Descriptive correlational research allowed the researcher to explore and describe the relationships and patterns without making causal claims. It was well-suited for investigating the complex interactions and associations between these variables. The researcher randomly targeted a population of 310 respondents. This group comprised a diverse range of participants, including; Ministry officials such as senior officials and policymakers, Human Resources Department officials, Gender Equality Officers, Diplomatic Staff and other support staff both male and female diplomatic staff at various levels junior, mid-level, and senior. Using Slovene’s formula, a sample size of 175 respondents was determined. The findings of the study indicated a significant positive correlation between gender representation in leadership roles and the effectiveness of diplomatic services, as evidenced by a Pearson correlation coefficient of 0.966. This suggests that an increase in gender representation in leadership positions is associated with improved effectiveness in diplomatic services.