Emergency workers killed in the September 11 attacks

Of the 2,977 victims killed in the September 11 attacks, 412 were emergency workers in New York City who responded to the World Trade Center. This included:
This article lists those emergency workers listed above who died while fulfilling their duties at the World Trade Center on September 11, 2001.
New York City Fire Department.
There were 75 firehouses in which at least one member was killed. The FDNY also lost its department chief, first deputy commissioner, one of its marshals, one of its chaplains, as well as other administrative or specialty personnel.
Operationally and geographically, the department is nominally organized into five borough commands for the five traditional boroughs of New York. Within those borough commands exist nine divisions, each headed by a deputy chief. Within each division operate four to seven battalions, led by a battalion chief and typically consisting of 180–200 firefighters and officers. Each battalion consists of four to eight companies, with a company being led by a captain. He commands three lieutenants and 16–42 firefighters. Last is the unit consisting of the members of the company on call during a given tour, consisting of a lieutenant or a captain plus a number of firefighters depending on the type of unit: three to four on an engine company, five on a ladder company (also known as a truck company), five for a rescue company, five for a squad company, four in a marine company, and six for the hazardous materials company.
On September 11, the battalion chief of Battalion 1 witnessed American Airlines Flight 11 crash into the North Tower of the World Trade Center and immediately radioed a multiple alarm incident. Over the course of the next three hours, 121 engine companies, 62 ladder companies and 27 fire officers were deployed to the scene. All off-duty firefighters were recalled—the first time the FDNY had issued a total recall in over 30 years. In addition to the regular fire apparatus and personnel assigned to the incident, the FDNY also deployed its only Haz-Mat unit, its mobile command center, its field communications unit, all its five rescue units, both of its high-rise units, six of its seven squad units, and one of its two tactical support units.
Fatalities by fire company.
The following list is a tally of the fatalities in each company which responded to the World Trade Center:
Rank, name, age.
The following list provides further details to the preceding list by categorizing the FDNY company with the rank, name, and age (if available) of each casualty. Names without ranks typically denote the rank of firefighter.
Port Authority Police Department.
Within minutes of Flight 11's impact, the Port Authority of New York and New Jersey Police Department (PAPD) began deploying officers from the Port Authority Trans-Hudson, bridges, tunnels, and airport commands. The PAPD commanding officer on the scene ordered a full evacuation of the North Tower at 9 a.m., about three minutes before Flight 175 hit the South Tower. At the same time, the PAPD's two most senior officers, superintendent Ferdinand Morrone and Chief James Romito, both arrived separately at the World Trade Center.
Some officers were ordered into the towers to assist with stairwell evacuations, while others helped with evacuations in the plaza and subway station. Superintendent Morrone was last seen helping evacuate tenants on the 45th floor of the North Tower before it collapsed while Chief Romito was in the 31st-floor region with four colleagues helping firefighters. The PAPD lost 37 officers, including Morrone and Romito:
One PAPD police dog, "Sirius", was also lost in the attacks.
New York City Police Department.
Several New York City Police Department (NYPD) officers saw Flight 11's impact with the North Tower and immediately reported it to dispatchers. Ten minutes after Flight 11's impact and seven minutes before Flight 175's impact, the NYPD chief of department was en route to the scene and raised the police mobilization to level 4, thereby sending around 22 lieutenants, 100 sergeants, and 800 police officers to the World Trade Center. NYPD personnel were primarily responsible for assisting in evacuations and helping injured civilians.
Three police helicopters were also deployed to report on conditions and assess the feasibility of a rooftop landing or of special rescue operations. Once Flight 175 had struck the South Tower, another level 4 mobilization was ordered, bringing to almost 2,000 the number of NYPD personnel at the scene. Some were ordered to enter the World Trade Center to assist with the FDNY's evacuations.
The 23 NYPD officers, including four sergeants and two detectives, who died at the scene were:
Private emergency medical services.
Eight emergency medical technicians and paramedics from private emergency medical services lost their lives while responding to the World Trade Center. Of note is that many of these personnel were working "911 contract" (that's the 911 emergency response system) units, that is, ambulances that are routinely dispatched by FDNY. These names included: