Iver C. Ranum High School was a public secondary school operated by Adams County School District 50 near Westminster, Colorado, United States, from 1961 to 2010. The high school was located in the Sherrelwood neighborhood in Adams County. It was named in honor of Iver Ranum, Superintendent of Adams County School District 50 from 1950 to 1975. The last class of Ranum High School graduated on May 8, 2010. The high school has been replaced by the new Westminster High School.

The building that housed Iver C. Ranum High School currently houses Iver C. Ranum Middle School.

• Hispanic 63.1%
• White 27.5%
• African American 1.7%
• Asian 7.0%
• Native American 0.7%

58% of Ranum's students received free/reduced lunch.

• Charles Pelkey (1976), Former minority whip of the Wyoming House of Representatives. Pelkey represented House House District 45, Laramie, from 2015 to 2021. He served as Whip from 2017 to 2021.
• Chad Ashton (1986)

The school offered the International Baccalaureate program.

• Adams County School District 50
• List of high schools in Colorado
• State of Colorado

• Iver C. Ranum Middle School website

39°50′32″N 105°01′00″W / 39.842292°N 105.016738°W / 39.842292; -105.016738 (Iver C Ranum High School)