Agency banking is the business carried out by an agent on behalf of an institution as permitted by the banking act in 2010. Through agency banking, banks have been able to recruit other businesses with a nationwide footprint to offer banking services on their behalf, allowing them to have branches in areas that were not previously commercially viable. This study sought to establish the contribution of agency banking services to financial performance of commercial banks in Kisumu City; A case of Equity bank. The study was guided by the following objectives: to establish the contribution of withdrawal of cash through agents financial performance of Equity banks in Kisumu County; to analyze the contribution of deposits of cash through agents on financial performance of Equity banks in Kisumu City; to establish the contribution of fund transfers from one account to another through agents on financial performance of Equity banks in Kisumu City. The study was anchored on financial intermediation theory and it adopted a descriptive research design which involves quantitative technique. The population size was equity bank managers and banking agents in Kisumu City. Sample size was selected using cluster followed by random sampling where the 56 banking agents and 4 managers were the respondents. Data was collected using questionnaire and analyzed data using frequency distribution, percentages, and SPSS helped in multiple regressions. The study found that cash withdrawal, cash deposit and cash transfer as agency banking services contributed to banks performance and the influence was statistically positively significant on bank performance. The study recommends that more banks should implement agency banking helping them to tap into more deposits and withdrawal eventually increasing financial performance. Bank management should initiate training sessions for their agents to equip them with financial skills needed to run the agents effectively. Security enhances operations of agents; the study recommends that the government of Kenya should thus improve security to enhance operation of the agents‟ bank.