Waco (/ˈweɪkoʊ/) is a city in and the county seat of McLennan County, Texas. It is situated along the Brazos River and on the I-35 corridor, halfway between Dallas and Austin. The city had a 2010 population of 124,805, an increase of almost 10 percent since the 2000 census. The Waco Metropolitan Statistical Area consists of just McLennan County, which had a 2010 population of 234,906.

Prior to the founding of Waco in 1849, a Wichita Native American group known as the "Waco" (Spanish: Hueco or Huaco) lived on the land of present-day downtown Waco. In 1824 Thomas M. Duke explored the area and reported to Stephen F. Austin describing the village: "This town is situated on the West Bank of the River. They have a spring almost as cold as ice itself. All we want is some Brandy and Sugar to have Ice Toddy. They have about 400 acres (1.6 km²) planted in corn, beans, pumpkins, and melons and that tended in good order. I think they cannot raise more than One Hundred Warriors." After Austin aborted the first attempt to destroy their village in 1825, he made a treaty with them. The Waco eventually moved out of the region, settling north near present-day Fort Worth. In 1872 they joined other Wichita tribes on a reservation in Oklahoma. In 1902 the Waco received allotments of land and became official US citizens.

Texas (ⁱ/ˈtɛksəs/) (Alibamu: Teksi ) is the second most populous and the second most extensive of the 50 United States, and the most extensive state of the 48 contiguous United States. The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in East Texas. Located in the South Central United States, Texas shares an international border with the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south, and borders the US states of New Mexico to the west, Oklahoma to the north, Arkansas to the northeast, and Louisiana to the east. Texas has an area of 268,820 square miles (696,200 km²), and a growing population of 25.7 million residents.

During the Spanish colonial rule, the area was officially known as the Nuevo Reino de Filipinas: La Provincia de Texas. Antonio Margil de Jesús was known to be the first person to use the name in a letter to the Viceroy of Mexico in July 20, 1716. The name was not popularly used in daily speech but often appeared in legal documents until the end of the 1800s.