| Johnston High School | |
| Grades: | 10–12 |
| Superintendent: | Nikki Roorda |
| Principal: | Ryan Woods |
| Enrollment: | 1,800(2023-24)[1] |
| Ratio: | 20.57 |
| Staff: | 43.04 (FTE) |
| Campus Type: | Suburban |
| Mascot: | Dragon |
| Newspaper: | The Black & White |
| Colors: | Purple and Gold |
| Streetaddress: | 6500 Northwest 100th Street |
| Zipcode: | 50131 |
| Country: | United States |
| Coordinates: | 41.6784°N -93.7576°W |
| Website: | Johnston High School |
| Feeders: | Johnston Middle School |
| Conference: | Central Iowa Metro League |
Johnston High School is a public secondary school located in Johnston, Iowa. It is part of the Johnston Community School District. The school serves approximately 1,800 students in grades 10 through 12. Freshman students attend Johnston Middle School.
Johnston High School's Iowa High School Athletic Association sanctioned teams include baseball, men's and women's basketball, bowling, men's and women's cross country, football, men's and women's golf, men's and women's soccer, women's softball, men's and women's swimming, dance team, cheer, men's and women's tennis, men's and women's track and field, women's volleyball and wrestling.
| Baseball | 1977, 2008, 2013, 2017, 2020, 2022, 2023[4] | |
| Basketball (boys) | 1994, 1995[5] | |
| Basketball (girls) | 2020[6],2022[7] | |
| Cross country (boys) | 1971, 1972, 1973[8] | |
| Cross country (girls) | 2014, 2016, 2017, 2019,2023 | |
| Golf (co-ed) | 2019 | |
| Golf (boys) | 2023[9] | |
| Soccer (boys) | 2023 Class 4A[10] | |
| Softball | 2009, 2014, 2016 | |
| Track and Field (boys) | 2023 Class 4A[11] | |
| Volleyball | 2007 |
The Johnston School Board set a date of September 11, 2012 for a special election on a $51 million bond referendum to build a new high school on property already owned by the district. Public meetings were held in the six weeks prior to the special election.[12] However, the measure was voted down by the community, which needed 60 percent approval to pass. On June 25, 2013, a reduced bond referendum of $41 million passed with 66% support.[13]
The aforementioned bond referendum involved the construction of a new high school; modifications were to be made to the then current Johnston High School, Johnston Middle School, and Wallace Elementary School to make them the new middle school, Wallace Elementary, and district administration/programming center, respectively.[14] Renovations were completed prior to the 2017–2018 academic year, and Johnston High School was moved to its current address.[15]
JHS has an award winning drama program. It also has three competitive show choirs.[16] The show choir program hosts an annual competition.[17]