Southwest Elementary School is located at 611 South Saunders Street, Belton, TX 76513. The campus serves students in kindergarten through grade 5. Enrollment stands at 398 students as of the 2023–24 school year. The student-teacher ratio is 12:1. The student body is 53% female and 47% male. State testing shows that 20% of students reached proficiency in math and 30% in reading. Southwest Elementary operates as a public non-charter school within Belton Independent School District, maintaining one full-time school counselor and serving a student body that is 82% economically disadvantaged — the second-highest economic need rate among Belton ISD campuses in this group — with 34 full-time teachers and spending $10,705 per student as part of the Belton ISD district average. Southwest Elementary serves a defined neighborhood attendance boundary in the southwestern residential corridor of Belton under Belton ISD's K–5 campus structure. Residential properties in this corridor trade near $300,000 based on current Belton area market data. As a high-need Belton, TX public elementary school within Belton ISD with a favorable 12:1 ratio and dedicated counseling support, Southwest stands among the best elementary schools in Texas for Title I-eligible public campuses in the Belton, TX school district.