Pensby High School is a co-educational secondary school in Pensby, on the Wirral Peninsula, Merseyside, England.

The school site was originally split between a boys' school and girls' school which was federated, allowing joint staffing/teaching across the two schools whilst the pupils of each school (in years 7 to 11 but not the sixth form) remained separate. The two schools merged to form one mixed school beginning from the start of the September 2015 term.

Notable former pupils

• Phillip Blond, political philosopher, theologian and director of the ResPublica think tank
• Graham Branch, a professional footballer with Tranmere Rovers 1991–1998, Burnley 1999–2007
• Steve Cummings, racing cyclist who took silver with GB team in 2004 Athens Olympics
• Mike Dean, FA premier league referee
• Phil Morris MBE, a former British army soldier who was awarded the David Cameron award for services for cancer awareness and survivorship. Awarded an Order of the British Empire from Her Majesty the Queen in June 2021
• Ian Woan, a professional footballer with Nottingham Forest 1990–2000