Arlington County, Virginia area. The county is situated in Northern Virginia on the southwestern bank of the Potomac River directly across from Washington, D.C., of which it was once a part. With a land area of , Arlington is the geographically smallest self-governing county in the U.S., and by reason of state law regarding population density, has no incorporated towns within its borders. Due to the county's proximity to downtown Washington, D.C., Arlington is home to many important installations for the capital region and U.S. government, including the Pentagon, Reagan National Airport, and Arlington National Cemetery. Many schools and universities have campuses in
Arlington County Fire Department transport units with one firefighter/EMT and one firefighter/paramedic. Arlington operates nine engine companies, three truck companies, two rescue companies and eight medic units. Additional medic units can be placed in service as necessary. The county is divided into two divisions, the North (112) and the South (111), with one Battalion Chief, an Advanced Paramedic Officer, an Assistant Fire Marshal and Deputy Fire Marshals in each division. Abbreviations: <nowiki>*</nowiki> - Indicates part-time units, often staffed during peak times only. Arlington County Fire Department is the primary all-hazards response agency for Arlington County, Virginia. In addition to ACFD, other fire departments operate