This article, based on the theme Dimensions of Sustainability in the Budgets of the cities in Rondônia with the Highest Firjan Index of Municipal Development, aims to analyze the budget execution of the cities in the State of Rondônia, identifying in the budgets the amounts of expenses paid and the total of the relative functions to the dimensions of sustainability. Documentary research related to 2021 on the Finbra website and in the Firjan system was carried out, and, with the collected data, tables were structured for a better visualization of these data. There were high percentage differences in expenses paid among the dimensions and among the cities whose showed average was 54.85% in the social dimension, 7.42% in the economic dimension and 1.88% in the environmental dimension. They also showed cities with high Firjan indexes, classified as unsustainable, such as in the capital Porto Velho and in the city of Vilhena. In the statistical test, there was a correlation only in the environmental dimension with the independent variables and it showed positive and moderate strength. It is concluded that the public administration is important for the reallocation of resources for the sustainable balance between the cities and the studied dimensions, and, for that, it was proposed the readaptation of the model with the insertion of other variables in the social and economic dimension. Based on this intention, the reflection contributed to a more effective analysis of municipal sustainable public policies.