The first settlers of Unitedville settled on the banks of Little Barton Creek due to a cart road running through the area and the village's proximity to the Belize River.^[1]

In 1960, the Belize Estate and Produce Company sought to evict all villages illegally situated on their lands—many of which had existed for over a hundred years. Unitedville was one of these villages.

George Cadle Price, leader of the People's United Party, urged the residents, "Do not move, we will win the elections in 1961 and we will get these lands for you all.". In March of 1961 his party won. In March 1961, his party won the elections. One of their first actions was to legally acquire the lands and settle the hundreds of thousands owed in back taxes to the BEC.^[2]

Small Barton Creek was renamed Unitedville during Belize's process of attaining independence from the United Kingdom.