McElwain Elementary School is located at 6631 Greenwood Orchard Drive, Katy, TX 77493. The campus serves students in pre-kindergarten through grade 5. Enrollment stands at 885 students as of the 2023–24 school year. The student-teacher ratio is 13:1. The student body is 51% female and 49% male. State testing shows that 42% of students reached proficiency in math and 59% in reading, with reading proficiency above the Texas state average. McElwain Elementary operates as a public non-charter school within Katy Independent School District, offering a Gifted and Talented program and maintaining one full-time school counselor — serving a student body that is 74% minority enrolled with 49% economically disadvantaged and 28% enrolled in bilingual or ELL programming. McElwain Elementary serves a defined neighborhood attendance boundary in the Greenwood Orchard residential corridor of Katy under Katy ISD's PK–5 campus structure. Residential properties in this corridor trade near $350,000 based on current Katy area housing data. Katy TX public elementary school within Katy ISD with Gifted and Talented programming and above-state-average reading performance, McElwain stands among the best elementary schools in Texas for public PK–5 campuses serving diverse communities in the Katy TX school district.