The following is a list of some notable Old Harrovians, former pupils of Harrow School in the United Kingdom.

Politicians, civil servants, and royalty

Civil servants, intelligence officers, and police

Diplomatic Service

Colonial Service and Imperial Administration

Royal Household and ceremonial officers

Royalty

Politicians

Prime Ministers and world leaders

Political party leaders

Cabinet members and parliament secretaries

British MPs

Foreign politicians and MEPs

Other politicians

Activists, humanitarians, philanthropists

Other nobility

Naval and military

Victoria Cross holders

Twenty Old Harrovians have been awarded the Victoria Cross:

Religion

Anglican clergy

Catholic clergy

Other clergy

Theologians and religious scholars

Arts

Journalism and media

Writers, poets, and philosophers

Architecture

Visual arts

Arts directors and patrons

Actors and personalities

Media producers, directors and writers

Music

Scientists and academics

Biologists, botanists and naturalists

Chemists and physicists

Engineers and inventors

Mathematician and statisticians

Meteorologists, astronomers, and astronauts

Physicians

Educators and institution leaders

Historians, antiquarians, archaeologists, and geologists

Sports

Cricketers

Bankers and economists

Business

Law

Adventurers, explorers, and mountaineers

Collectors and numismatists

Others

Old Harrovians in fiction