Traditional food markets are essential in urban food environments in Kenya and other low- and middle-income countries (LMICs). They provide affordable fresh food, particularly for low-income urban communities, and are vital places of livelihoods and local economic activities. Despite their importance, associations between market-related factors and diet quality for vendors and consumers are underexplored. This study explores these relationships to inform policies aimed at improving diets and nutrition in LMICs. Methods: Survey data were collected from 1042 vendors and 876 consumers in five urban markets in Kenya.