The National Petroleum Reserve-Alaska (NPRA) Legacy Data Archive contains geological and geophysical data collected during two extensive exploration programs, the first conducted by the U.S. Navy between 1944 and 1953 and a second conducted by the U.S. Geological Survey (USGS) from 1974 to 1982. The data referenced here includes records from 36 test wells, 45 core tests, and over 12,000 line miles of seismic data, along with a wide array of analyses and documents generated during the exploration of the NPRA. The archive serves as a vital resource for understanding the geophysical characteristics of the NPRA region and supports ongoing and future research.