The State Guard Association of the United States (SGAUS) is a non-profit organization advocating for the advancement and support of regulated state military forces, as established by state governments under the authority of federal law. The SGAUS encourages the establishment and advancement of regulated state forces through lobbying and affiliation with independent state associations.

The Texas State Guard (TXSG) is part of the state military force of Texas, and one of three branches of the Texas Military Forces. Along with the other two branches, the TXSG falls under the command of the Governor of Texas and is administered by the Adjutant General of Texas, an appointee of the Governor. The other two branches of the Texas Military Forces are the Texas Army National Guard and the Texas Air National Guard.