It is named for Mirabeau B. Lamar, the second president of the Republic of Texas, and serves grades 9 through 12 in the Arlington Independent School District.

Cathy Brown of The Dallas Morning News Said that Lamar's effect on Sam Houston was "minimal" because there were very few housing units located north of Division and east of Collins.

Brown said that Sam Houston and Lamar were "relatively unaffected" by the opening of Martin, located in southwest Arlington.

[2] Ellis, Larson, Peach, Sherrod, and Webb Elementaries feed into Nichols Jr. High.

Butler, Pope, Speer, and Wimbish Elementaries feed into Shackelford Jr. High.