St. Mary's Catholic School is a private Roman Catholic PreK thru High School in Longview, Texas. It is located in the Roman Catholic Diocese of Tyler.

• Faith: Growth in knowledge and spirituality; appreciation of values and a capacity for right judgement
• Scholarship: Application of intellectual skills such as critical thinking, problem solving and understanding; development of each student's individual academic potential
• Leadership: Learn wise use of leisure time; discover and develop imagination, originality and creative abilities; practice the principles of democratic living; learn to work with others
• Service: Giving witness to the faith by putting love into action; forming a social conscience with a zeal for the common good

St. Mary's Catholic School students compete in Soccer, Volleyball, Softball, Track, Cross Country, Golf, and Tennis [added 2020] through the Texas Association of Private and Public School (TAPPS). St. Mary's Catholic School students also compete in Archery through National Archery In The Schools Program (NASP). St. Mary's Catholic School students can compete in TAPPS academics, and TAPPS art.

• St. Mary's Catholic School website