The informal sector plays an important role in employment absorption in Kediri Regency, with women making substantial contributions despite facing various structural and socio-economic challenges. This study aims to analyze the determinants of productivity among informal sector workers in Kediri Regency, with particular attention to women’s position within the informal economy. The study employs a quantitative approach using secondary data from the 2023 National Socioeconomic Survey (SUSENAS), comprising 3,524 informal sector workers. Although women constitute the primary focus of the study, male workers are included as a comparison group to assess whether productivity differences are associated with gender or with other socioeconomic characteristics. To estimate the probability of workers being categorized as productive, the analysis applies a Complementary Log-Log (Cloglog) regression model. The results indicate that age, educational attainment, and working hours significantly influence worker productivity. Workers with higher levels of education, greater age, and longer working hours are more likely to be categorized as productive. In contrast, gender, marital status, occupation type, internet use, micro-enterprise ownership, and social security participation do not exhibit statistically significant effects on productivity. These findings suggest that productivity in the informal sector is primarily driven by human capital characteristics and labor input rather than demographic differences alone. However, the insignificant effects of internet use and social protection should be interpreted cautiously, as they may reflect contextual and measurement limitations rather than the absence of economic relevance. The study highlights the importance of strengthening educational opportunities, skills development, and productive employment opportunities to enhance productivity and support women’s economic empowerment in the informal sector