Larry P. v. Riles is a California court case in which the court held that IQ tests could not be used to place African-American students in special education classes.

Five African-American children had been placed in special classes for the "educable mentally retarded", based on low IQ test scores. Judge Robert F. Peckham ruled that they had been wrongly placed.

The case was filed by the National Association for the Advancement of Colored People (NAACP) Legal Defense fund. "Larry P." was one of the children, real name Darryl Lester. Wilson Riles was the California State Superintendent of Public Instruction.

The case was initially filed in 1971, as a class-action on behalf of six African-American students in the San Francisco School District. On June 20, 1972, a preliminary injunction was issued forbidding the use of IQ tests by the San Francisco School District to place African-American students in special education. The injunction was upheld on appeal in 1974.

A trial on the merits was delayed because of the implementation of the 1974 master plan, but the case eventually proceeded to trial in October 1977.

The final ruling was issued by United States District Court for the Northern District of California in 1979.

The primary ruling was upheld on appeal to the 9th circuit in 1984.

The appeals court, in 1984, further banned the use of IQ tests on African-American children.^{[dubious – discuss]}