McCallie School is a private, all-boys, college-preparatory school located on Missionary Ridge in Chattanooga, Tennessee, United States. Established in 1905, the school serves students in grades 6 through 12 and offers both day and boarding programs.

Brothers Spencer Jarnigan and James "Park" McCallie founded the school in 1905, which remained under the control of the family until a board of trustees assumed management of the school in 1937.

Founded as an all-boys school, McCallie became a military school in the wake of World War I. In 1970, McCallie dropped its military program as a result of admission challenges during the Vietnam War.

Like most schools in Tennessee, the McCallie School was formerly racially segregated. While the school's board of trustees agreed to allow the admission of African-American students beginning with day students in 1969 and boarding students in 1970, the school did not admit its first African-American student until 1971.

McCallie has a close relationship with Girls Preparatory School (GPS). One of the co-founders of GPS was Grace McCallie, sister to Spencer and Park.^{[citation needed]}

Donated to the theater department, the Scott Langley '68 Drama Collection is a collection of plays and theater history books, located in the rehearsal room. Langley graduated as valedictorian from McCallie in 1968. He was involved in theater and swimming during his time at McCallie.

McCallie's first dorm, Founder's Hall, had eight students. In 1907, a record enrollment of 110 students required an additional dormitory; the school built the two-story Douglas Hall on Kyle Street, accommodating 35 boys. It also served as the headmaster's office and a residence for James McCallie.

In the early 1950s, the school constructed North and South Hutch along with Maclellan Hall.