San Isidro Independent School District proudly serves our rural farming community in northeastern Starr County, Texas. As part of TEA Region One, our district spans 275 square miles centered around San Isidro, TX, and is home to approximately 150 students across our Elementary, Junior High, and High School campuses. We are a close-knit district where students are known by name, supported like family, and encouraged to thrive every day.
Our work is shaped by a strong and purposeful vision: “San Isidro ISD builds on the tradition of pride and academic excellence, providing each student with the necessary skills to achieve their full potential. We advocate for everyone in our learning community. We innovate to create opportunities. We expect excellence.” This commitment is reflected in every classroom, program, and opportunity we offer.
From our NEW Pre-K 3 Program to early college and career readiness pathways, San Isidro ISD provides a high-quality, future-focused education in a safe and nurturing environment. Our small class sizes and dedicated educators allow for personalized support, while our 1:1 technology devices help ensure students are prepared for an ever-evolving world.
We offer dual credit, CTE, and college readiness programs designed to open doors for students pursuing higher education and workforce opportunities. Through GEAR UP and ACE, students benefit from extended learning and enrichment after school. Our district also proudly supports competitive athletics, active student leadership clubs, meaningful cultural celebrations, and strong community partnerships that enhance the overall student experience.
Welcome to Tiger Nation—where excellence rides with tradition, and every student is empowered to reach their full potential.
Welcome, Dr. Mark A. Olivarez: San Isidro ISD's New District Principal
San Isidro ISD is proud to welcome Dr. Mark A. Olivarez as our new District Principal, a leader with a wealth of experience, deep roots in our community, and an unwavering commitment to student success. Approved by the school board on June 30th, Dr. Olivarez’s first official day as a Tiger was today, and we are excited to begin this new chapter in our district’s journey under his leadership.
A Proud Connection to San Isidro
Dr. Olivarez, a native of San Isidro, has a unique and personal connection to our district. His father, Noe Olivarez, graduated from San Isidro ISD, and Dr. Olivarez himself grew up in the region, fostering a deep appreciation for the community he now serves. His journey to leadership in education has been marked by a passion for empowering students, making a positive impact in their lives, and creating an environment where they can thrive.
A Distinguished Career in Education and Service
Dr. Olivarez’s career in education began in 2007 when he became a teacher at Dr. Mario Ramirez Elementary. Since then, his passion for supporting students has propelled him into various leadership roles. He earned his Master’s Degree in Education Administration from Lamar University in 2009 and served as an assistant principal at both the elementary and high school levels for eight years. In 2020, Dr. Olivarez became the Principal at John and Olive Hinojosa Elementary, where he led the school with a focus on academic excellence, student well-being, and community engagement.
In 2021, Dr. Olivarez transitioned to the role of Director of Other Special Populations, where he worked to support military-connected, foster care, and homeless students. His efforts during this time demonstrated his commitment to ensuring every student, regardless of their background, receives the support they need to succeed. This role added to his diverse leadership experience, preparing him for the district’s highest leadership position.
Educational Achievements and Certifications
A lifelong learner, Dr. Olivarez earned his Doctoral degree in Educational Leadership from Lamar University in May 2025. He is also certified as a Superintendent through the University of Texas-Arlington, a testament to his dedication to advancing his skills and ensuring that he is equipped with the knowledge and tools necessary to lead a district to success.
Dr. Olivarez’s experience spans not only leadership in academics but also in safety and security. In 2023, he assumed the role of Director of Risk Management, where he worked with the district to ensure a safe and secure learning environment for all students and staff. His diverse background makes him an ideal fit to lead our district through both academic growth and the ongoing challenges of ensuring student safety.
A Leader Who Prioritizes Community
Throughout his career, Dr. Olivarez has worked tirelessly to foster a sense of community. His work with military-connected students, foster care students, and students experiencing homelessness speaks to his dedication to the whole child. He understands the challenges students face and works to remove barriers to success. He is a leader who listens, supports, and works alongside others to achieve common goals.
Dr. Olivarez is married to Lilliana Duran Olivarez, and together, they have two children: Edgar Jr., 30, and Madison Alysse, 18. His family values align closely with the values of San Isidro ISD—dedication, community, and service.
Looking Ahead to a Bright Future
As District Principal, Dr. Olivarez is committed to ensuring that San Isidro ISD remains a place where every student has the opportunity to succeed. He brings a wealth of knowledge, leadership, and passion for education that will undoubtedly help propel our district to new heights.
We are excited to have Dr. Olivarez join our team, and we look forward to the positive changes and progress his leadership will bring. Please join us in welcoming him to San Isidro ISD and to the Tiger family!
Mrs. Elsa V. Morris
District Superintendent
The San Isidro Independent School District selected Elsa V. Morris as the Superintendent Lone Finalist during a special called board meeting on January 20, 2025.
Morris recently served as the Interim Superintendent at Rio Grande City Grulla CISD, where she spent three decades in various roles, including leading Curriculum and Instruction as Assistant Superintendent.
Her diverse educational track record starting as an English and Student Leadership Teacher, along with her career as a High School Counselor, led her to spearhead various successful initiatives at the district level such as the development of comprehensive, targeted plans, the implementation of legislative priorities, the responsiveness of the Resilient Schools Support Program as part of the district’s Health and Safety Plan, and the management of the district’s Teacher Incentive Allotment plan providing additional monetary support to teachers excelling in reaching their student outcomes. In addition, she was instrumental in ensuring the district reached a 98% annual graduation rate.
A graduate of the University of Texas-Pan American, she received a Bachelor of Arts in English, a Master’s in Education: Counseling & Guidance, and her Mid-Management Certificate. In 2017, she received her Superintendent Certificate from the University of Texas Rio Grande Valley.
The San Isidro ISD School Board conducted a comprehensive Superintendent Search with the assistance of Region One Education Service Center.
“We welcome Ms. Morris to our Tiger Family! We are looking forward to working with such a dynamic leader in education,” said David Garza, President of the San Isidro ISD School Board.“Her experience and background are a great fit for our school community.”
ABOUT SAN ISIDRO ISD
San Isidro Independent School District is in Starr County. It encompasses 275 square miles of rural farming community and serves 160 students at three campuses: an Elementary school, a junior high school, and a High School.
