Маңһэттен Бич орта мектебі және оның жетістіктері

Public high school in Manhattan Beach, California
It was a part of the South Bay Union High School District until 1993, when this district was dissolved and the Manhattan Beach Unified School District (MBUSD) was formed.

On June 11, 2020, hundreds of Mira Costa students and parents attended a march from Hermosa Beach to Manhattan Beach to celebrate their graduation in violation of CDC social distancing guidelines. Their actions attracted widespread negative attention from media and concerned citizens for putting others at risk during the 2020 COVID 19 pandemic.

The Mira Costa Choir Program consists of four curricular choirs, Vocal Ensemble, Men's Choir, Advanced Women's Chorale, and Concert Choir, which meet during the school day year round, and two small ensembles, Coterie, Mira Costa Muscle, which meet after school. In the summer of 2010 Vocal Ensemble sang in the International Festival of the Aegean in Syros, Greece. They performed as part of the opera chorus in Carmen and were the closing choir in the Sunset Concert at St. Nicholas Cathedral on Sunday 18 July 2010. In the Spring of 2011, all four Mira Costa Choirs performed in Carnegie Hall as part of Carnegie Hall's WorldStrides National Choral Festival. The Vocal Ensembled had the honor of performing as the featured solo choir.

In May 2016, the Mira Costa Bands traveled to Carnegie Hall in New York as part of a series outlining the best band programs in the country. The band had previously performed at Carnegie Hall in 2011. In 2014 the band received the Grammy Foundation Signature Schools 2014 Gold Award, which includes a grant of $5000.

Mira Costa's student run newspaper La Vista has been a perennial winner of silver and gold awards from the Columbia Scholastic Press Association since 1980.

The Mustang Morning News is a student run broadcast.

Mira Costa Model United Nations is a debate team that takes part in mock debates of the United Nations. The team hosts the Los Angeles Invitational Model United Nations (LAIMUN) Conference, a novice and advanced conference held in docket style debate. Mira Costa's team has multiple Large School Delegation awards.

Costa students team up with Redondo Union High School students to create Beach Cities Robotics. The team participates in the organization FIRST (For Inspiration and Recognition of Science and Technology) as Team 294. Beach Cities Robotics has won numerous awards since starting in 1997, including 2 World Championship wins. They scored 1st place at the FRC finals in 2001 against more than 50 other teams at the event from around the country. In 2008 they won first place at the inaugural FTC World Championship. Beach Cities Robotics won the FRC finals again in 2010 as its "alliance" captain, against over 300 teams attending the World Championship, and over 1800 teams worldwide.

Alix Klineman, who was named the 2005 and 2006 California Gatorade State Player of the Year for Volleyball, and the 2006 Gatorade National Player of the Year, led Mira Costa to three consecutive California State Championships, and three consecutive Southern Section California Interscholastic Federation (CIF) Championships. The Boy's Volleyball team has won the Southern Section California Interscholastic Federation (CIF) Championships in 1984, 1990, 1996, 2001, 2002, 2008 and 2012.

Mira Costa was recognized as a Blue Ribbon school in 1996. It was named a California Distinguished School by the Board of Education in 2011 and ranked #341 nationally by Newsweek in 2015. In 2000, 12th grade English teacher Marilyn Jachetti Whirry was selected as the National Teacher of the Year. Whirry had taught at Mira Costa in the 1958–59 academic year and then from 1967 through 2000. In September 2010, U. S. history teacher Bill Fauver was selected as one of Los Angeles County's 16 Teachers of the Year. He was once named MBUSD Teacher of the Year.