Built in 1855, the original Washington High School—not yet known by that name—opened in 1857. In 1869, it narrowed from a general school to a high school. Originally called "the schoolhouse," the "Cedar Rapids graded school," and the "second ward school", it received its current name in 1875 when all the Cedar Rapids schools were named for presidents. The oldest building was called Washington School. In 1887, Abbie S. Abbott began her 34-year tenure as Washington High School principal. The school was expanded in 1910 to help deal with overcrowding, but the expanded room from the addition did not suffice for long. The nearby
vocational school Grant School was converted to a regular high school to reduce the burden. Deteriorating conditions at the original structure led to its abandonment in 1935. Four junior high schools in the area, which had been expanded in preparation, were converted to joint junior/senior high schools. September 3, 1957, was the first day of school at new Washington. Washington began with grades 10-12 and became a four-year high school in 1987. During the 1956–57 school year, students voted on colors for the new school and selected red and blue with white trim. They also picked the “Warrior” as Washington's mascot. In 1961, of classroom space were added to the south end of the building—12 classrooms. In 1971, the area under the library was enclosed to provide new office space for the counselors. In 1990, a new gymnasium was built to accommodate the increasing number of recognition assemblies. In 2003, a large wing of six classrooms and six science laboratories was added to the southwest corner of the building. At the same time, a new band room was completed and the entire original music area was remodeled to house the growing vocal and string orchestra programs. The first principal, Fred J. Kluss, had been principal at Roosevelt before coming to Washington in 1957. Kluss was succeeded as principal by Don Birdsell, who served for three years. Robert O. Fitzsimmons became principal in 1962. Donald G. Nau took over as principal in the middle of the 1966–67 school year. Ralph Plagman was principal from 1981 to 2016. Ralph Plagman resigned in 2016, with Dr. Carlos Grant taking up the job as interim. John Cline was hired as principal on April 19, 2017. After the 2020 school year, John Cline resigned from the job and moved back to North Carolina. The international pandemic and his deep marital issues were cited as the reasons for his resignation. In December 2017, a former substitute teacher at the school, Mary Elizabeth Haglin, was convicted of sexual exploitation by a school employee, an aggravated misdemeanor. She had a sexual relationship with 17-year-old student from 2015 to June 2016. An appeal, on May 2, 2018, upheld the ruling of 90 days jail sentence, the appeal delaying the start of her sentence until October 2018. == Art gallery ==