The National Emergency Services Museum (NESM) is an independent, self-funded museum and charity dedicated to celebrating and preserving the history of the emergency services and their communities, in peace and war. They are regularly involved in local community work, wider national and international projects as well as events all over the country. They are the largest combined emergency services museum in the world.

The museum is housed in a historic combined police, fire, and ambulance station in Sheffield City Centre. Their building dates back to 1900 and several original features, such as the Victorian police cells and engine house, have been preserved within the museum.