| Rock Creek Junior/Senior High School | |
| Address: | 9355 Flush Road |
| City: | St. George |
| State: | Kansas |
| Zipcode: | 66535 |
| Country: | United States |
| District: | Rock Creek USD 323 |
| Type: | Public |
| Principal: | Eric Koppes |
| Faculty: | 31.90 (on FTE basis) |
| Ratio: | 13.35 |
| Enrollment: | 426 (2018-19)[1] |
| Grades: | 7–12 |
| Established: | 1991 |
| Mascot: | Mustangs |
| Colors: | Black, White, & Silver |
Rock Creek High School (RCHS or RCMS) is a high school that sits between and serves the townships of St. George and Westmoreland, Kansas. It is operated by Rock Creek USD 323 school district.
The school was established in 1991 and combined the student bodies of Westmoreland High School and Saint George High School. It originally enrolled grades 7–12. In 2020, an addition to the school was completed, increasing the grades enrolled to 5-12.
In 2009, Rock Creek Junior/Senior High School was selected as a Blue Ribbon School. The Blue Ribbon Award recognizes public and private schools which perform at high levels or have made significant academic improvements.