Humble was originally established as a sawmill town along the Houston East & West Texas Railway in 1886. It was named for Pleasant Smith Humble, the town's first US postmaster. Humble became a boomtown overnight when oil was discovered in 1904. Humble and neighboring Moonshine Hill became places where million-dollar fortunes were made and lost. In 1911, the Humble Oil Company was founded by Ross Sterling and other men from the Humble oil fields. Sterling went on to become governor of Texas in 1931. The Humble Oil Company became one of the dominant oil companies in the world, eventually becoming Exxon in 1972.