[1] A Joint union school district is similar, but the component districts are "situated wholly or in part in different counties".
In Arizona, a union high school district is generally one that includes and operates high schools.
Examples include the Casa Grande Union High School District (the Union school still uses the full name), the Phoenix Union High School District, the Glendale Union High School District, and the Tempe Union High School District.
[citation needed] The California Education Code states that "A high school district, other than a city high school district, comprising two or more elementary school districts lying wholly in the same county is a union high school district, and such designation shall be part of its name.
[4] Several school districts are named "Union School District" or similar constructions, without it satisfying the criteria above: