In 1884, a school named "Big Cypress Schoolhouse, No. 2. Dist. 6," also known as the "Cypress School," was built. Rural High School No. 5, built in 1937, was part of the Fairbanks School District. The Cypress and Fairbanks school districts consolidated in 1939. Rural High School No. 5 continued to serve as the district's high school until Cy-Fair High School was opened in the spring of 1942. Following court-ordered desegregation, the Carverdale school for African-American students was closed on August 3, 1970, and high school students were transferred to Cy-Fair High School. In 2000-01, the school was renovated and expanded, adding 20 classrooms and a new library. In 2017, as part of high school rezoning, a portion of Cy-Fair's attendance zone was to be reassigned to Cypress Ranch High School. On August of 2017 the school became flooded as a result of Hurricane Harvey. The school, as well as all the schools in the Cypress Fairbanks District, postponed the first day of school for 2017-2018 for two weeks before reopening on September 11th, 2017.
Academics
For the 2018-2019 school year, the school received an A grade from the Texas Education Agency, with an overall score of 90 out of 100. The school received a B grade in two domains, School Progress and Closing the Gaps, and an A grade in Student Achievement. The school received one of the seven possible distinction designations for Top 25%: Comparative Academic Growth.
The 1985football team finished with a 13-1-1 record, losing to perennial power Permian High School 7-10 in the state semifinals. In 2017, the football team went undefeated and won the 6A Division 2 State Championship against Midway High School.
Basketball
The 1969-70 boy's basketball team advanced to the 3A state championship game, losing in the final. In the 1970-71 season, the team won the 4A state championship, and were given the honorific title of "National Champions." The team advanced to the 4A state semifinals in the 1977-78 season. The girl's basketball team won the 5A state championship in the 2007-08 season, defeating DeSoto High School in the final. The team won another 5A state championship in the 2009-10 season.
Volleyball
The 1986-87 girl's volleyball team were the 5A state champions, defeating Amarillo High School in the final.
Demographics
The demographic breakdown of the 3,526 students enrolled for 2017-18 was:
African American: 12.5%
Hispanic: 31.8%
White: 42.8%
Native American: 0.6%
Asian: 9.7%
Pacific Islander: 0.0%
Two or More Races: 2.6%
33.7% of the students were eligible for free or reduced-cost lunch.
Feeder patterns
All Arnold Middle School and some Hamilton Middle School students are within Cy-Fair High School's attendance boundary. There are four elementary schools that feed into Arnold Middle School:
Adam Elementary
Danish Elementary
Lamkin Elementary
Millsap Elementary
There are two elementary schools that feed into Hamilton Middle School within Cy-Fair's attendance boundary:
