Oscar Longoria was born in Mission and raised in South Texas. He is a product of the La Joya Independent School District. Longoria attended South Texas College for two years before transferring to the University of Texas at Austin, where he graduated in 2003 with a Bachelor of Science in Communication Studies. In 2007, Oscar Longoria graduated with his Doctorate of Jurisprudence from the University of Texas School of Law.
Professionally, Longoria owns and operates the Law Office of Oscar Longoria, representing clients on a variety of issues. He is Licensed to practice law in Texas, Licensed to practice law in the United States Southern District of Texas, and a Certified Mediator, via the University of Texas School of Law. Longoria is a member of the Texas Trial Lawyers Association, the Hidalgo County Bar Association, and the Hidalgo County Young Lawyers Association.
An active member of his community, Oscar Longoria has previously served on the Agua Special Utility District as a Board Member and is also a former Board of Trustee for South Texas College (STC), which serves approximately 30,000 students across the Rio Grande Valley.
In 2012 he was elected State Representative for Texas House District 35.