Wortham, Texas 2017 Population Estimate â 1,087 The Texas Water Development Board projects the Wortham 2015 population as 1,028 people and the 2020 population as 1,175. If we assume that the population changes linearly between 2015 and 2020, then the Wortham 2017 population would be 1,087. Note: this value is a projection, not a count. The 2010 Decennial Census provides the most recent count of the Wortham population as 1,073 people.