This study aims to determine the application of MIX marketing as an effort to increase the number of deposit customers at Bank KB Bukopin KC Cilegon. The research was conducted using quantitative descriptive methods with the theory of elements of the marketing mix (product, price, place, promotion, people, process, physical). The population used as the employees and customers of Bank KB Bukopin KC Cilegon and the sample of informants as many as 30 respondents. The study was conducted at Bank KB Bukopin KC Cilegon on March 20 to July 22, 2021. Data were collected using a questionnaire or questionnaire, and analyzed using descriptive statistics of respondents on a Likert scale. Based on the results of the study, it can be concluded that the respondents obtained in the score category "agree" along with the variable score data include: Product 64%, Price 66%, Place 69%, Promotion 62%, People 66%, Process 72% and Physical 74% . This is in the "Good Enough" category and steps to implement strategies to maintain product quality, interest offered, increase promotions, services and building facilities so that customers continue to exist