The National Personnel Records Center is an agency of the National Archives and Records Administration, created in 1966. It is part of the National Archives federal records center system and is divided into two large Federal Records Centers located in St. Louis, Missouri and Valmeyer, Illinois.
The Military Personnel Records Center houses United States Armed Forces military service records dating from the late 1800s to the early 2000s. A major fire on July 12, 1973 destroyed approximately one-third of its 52 million official military personnel files.
The facility was originally located in Overland, Missouri before relocating to Spanish Lake, Missouri in 2011. While located at 9700 Page Avenue, in Overland, the military personnel records center building served as the de facto headquarters for the entire National Personnel Records Center, and was often referred to simply as "NPRC" (the building's official code was NPRC-MPR).
After relocation to Spanish Lake, the designation "Military Personnel Records Center" was dropped from most official correspondence, with the military records building in Spanish Lake thereafter referred to as the "National Personnel Records Center". The term "National Personnel Records Center" may now refer to both the physical military records building in Spanish Lake, as well as an overall term for the National Archives federal records complexes located in St. Louis.
The Civilian Personnel Records Center houses the Official Personnel Folders (OPF) and Employee Medical Folders (EMF) of separated United States Federal civilian employees. CPR also houses personnel documents that date back to the mid-nineteenth century, although the bulk of the collection covers the period from 1900 to present. The medical records of military family members treated at Army, Air Force and Coast Guard medical facilities are also stored here.
The Civilian Personnel Records Center was first known as the "St. Louis Federal Records Center" before becoming part of the National Personnel Records Center in 1966. The Civilian Personnel Records Center was located on Winnebago Street in downtown St. Louis, Missouri, and was known as "NPRC-CPR". The facility later shifted locations to Boulder Boulevard in Valmeyer, Illinois and became known as the "NPRC Annex".