| Katanning Senior High School | |
| Motto: | We Strive to Excel |
| Type: | Public co-educational high day school |
| Educational Authority: | WA Department of Education |
| Principal: | Innocent Chikwama |
| Grades Label: | Years |
| Location: | Katanning |
| Country: | Australia |
| Campus Type: | Regional |
| Mapframe-Stroke-Colour: |
|
| Mapframe-Marker-Colour: |
|
| Pushpin Map: | Australia Western Australia |
| Pushpin Image: | Australia Western Australia relief location map.png |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Western Australia |
| Pushpin Label Position: | top |
| Enrolment: | 373 |
| Enrolment As Of: | 2012 |
| Colours: | Red, blue and white |
Katanning Senior High School is a comprehensive public co-educational high day school, located in Katanning, a regional centre 280km (170miles) south east of Perth, Western Australia.
The school was established in 1961 and by 2012 had an enrolment of 373 students between Year 8 and Year 12, approximately 15% of whom were Indigenous Australians.
The school initially opened as a junior high school in 1950 and continued to operate as one until becoming a high school in 1961.
Beverley Stanes was the principal of the school from 2004 to 2010, before departing to take the principal position at Merredin College. Nicki Polding was the principal of the school from 2011 to 2017. Carolyn Cook served as principal from 2017 to 2021. In 2022, Innocent Chikwama was appointed as principal.
Enrolments at the school have been reasonably steady with 373 students at the school in 2017, 385 in 2018, 378 in 2009 and 359 in 2020.
Katanning Residential College was located adjacent to the school and offered boarding facilities to many High School students from remote areas. The College was formerly known as St Andrew's Hostel. The Residential College closed in 2009.