According to Kenya Police Service Annual Crime Reports (KPSACR) of 2016, the number of criminal offences is still on the increase with the 2013, 2014 and 2015 reports evidencing an offence number of 71832, 72,490 and 73,376 respectively. Based on this upward trend, it is still unclear if the trend is related to human resource practices such as job promotion as applied in the administration police which in turn have an effect on the performance of the administration police. In the service industry, especially the Kenya National Police Service, little research has been conducted on job promotion and employee performance especially in Bungoma County. The purpose of this study was to establish the influence of job promotion on the performance of administration police. The study adopted a descriptive survey design. The target population was 1,318 administration police officers in Bungoma County rom which a sample size of 384 respondents was used. Questionnaires were the main instruments used to collect primary data. Stratified random sampling, simple random sampling and systematic random sampling techniques were used. Data was analyzed using both descriptive and inferential statistics. Reliability analysis gave an average Cronbach alpha value of 0.8034 which indicated that the instruments were reliable. Results of the study showed that there was a statistically significant positive relationship between job promotion and employee performance and that job promotion accounted for 71.3% (R2 = 0.713) variations in the employee performance. It was concluded that if job promotion was well executed in the administration police, the performance of the staff would be enhanced. The following were the recommendations of the study: organizations should adhere strictly to its promotion policy, ensure promotion process is fair and that employees are promoted based on merit. The findings of this study is expected to inform administration police management policy makers, the government