|Coaches||Marcia Borden (2006–present)|
|School Size||2019 (March 2016)|
Cosby High School is a public secondary school in Midlothian, Chesterfield County, Virginia. It is coached by Marcia Borden and is active in the Richmond-area invitational circuit, VHSL and Battle of the Brains.
In VHSL, Cosby was part of the VHSL Central Region until the 2014 VHSL Realignment. After the 2014 realignment, Cosby became part of VHSL Region 6A South. Starting with the 2017-18 season, Hayfield will be part of VHSL Class 6 Region B as a result of the 2018 VHSL Realignment.
Cosby won the 2017 Conference 3 tournament.
Cosby won the 2016 VCU Battle of the Brains-style Tournament. Cosby finished runner-up to Maggie Walker at the inaugural 2008 VCU Winter Tournament, which they have frequently attended since then. They placed third at the 2009 NAQT Virginia State Championship.
Notable alumni include Cameron Orth.