U.S. District Court, Eastern District of Texas | 562 followers on LinkedIn. Honorable Amos L. Mazzant, III, Chief Judge ~ David A. O'Toole, Clerk of Court | The U.S. Courts were created under Article III of the Constitution to administer justice fairly and impartially, within the jurisdiction established by the Constitution and Congress. The Eastern District of Texas is made up of 43 of the 254 counties in Texas.