The objective of this study was to determine the effect of warehouse consolidation on performance of distribution firms in Nairobi City County. The study was conducted amongst respondents who were targeted in this study from Nairobi City County It made use of the descriptive research design. ; data were collected from 138 respondents via questionnaire. These responses were analyzed via spearman rank order correlation, within the confines of SPSS version 23. This study found out that economic order quantity was significantly related to these performance of distribution firms in Nairobi City County under this study, In conclusion, this study points out that an effective implementation of the performance of distribution firms in Nairobi City County it requires warehouse consolidation on performance of distribution firms to achieve this outcomes using economic order quantity, improved efficiency, lead time and improved customer service would enhance warehouse consolidation on performance of distribution firms in Nairobi City County, Kenya.