St. Mark's School of Texas
| St. Mark's School of Texas | |
|---|---|
| Location | |
10600 Preston Road , 75230 | |
| Coordinates | 32°53′25″N 96°48′03″W / 32.890363°N 96.800762°W |
| Information | |
| Type | |
| Motto | Courage and Honor |
| Religious affiliation | Nonsectarian |
| Established | 1906 |
| Headmaster | David W. Dini |
| Faculty | 97 full-time teachers |
| Grades | 1–12 |
| Gender | All-boys |
| Enrollment | 923 |
| Campus size | 42 acres (17 ha) |
| Campus type | Suburban |
| Colors | Navy & Gold |
| Athletics conference | SPC |
| Mascot | Lion |
| Nickname | Lions |
| Accreditation | ISAS |
| Endowment | $200 million (June 30, 2025) |
| Tuition | $32,537–$40,735 |
| Website | smtexas |
The St. Mark's School of Texas is a private, nonsectarian, college-preparatory day school in Dallas, Texas. Established in 1906, St. Mark's educates roughly 900 boys in grades 1-12.