Access to justice in urban slums of Zambia is a critical issue affecting vulnerable populations such as migrant workers and sex workers. The research employed a mixed-methods approach involving structured interviews with 200 vulnerable individuals and focus group discussions with community leaders. Data analysis utilised thematic content analysis to identify patterns and themes related to access issues. Findings indicate that language barriers are the most significant obstacle preventing vulnerable populations from accessing justice in urban slums, with about 65% of respondents reporting this issue as a hindrance. The study concludes by highlighting the need for culturally sensitive and multilingual legal services to improve access for marginalized communities in Zambia’s urban areas. Recommendations include developing more multilingual legal aid programmes, increasing police training on recognising vulnerable groups, and implementing community outreach initiatives to bridge service gaps.