Magnetic data collected as part of a high-resolution airborne magnetic and radiometric survey over parts of central and northeastern Florida and southeastern Georgia are provided here as a flight line database, grids, and imagery. The dataset was acquired as part of the UGSS Earth Mapping Resource Initiative (Earth MRI) to improve our understanding of the fundamental geologic framework of the region with applications to evaluating natural resources and geologic hazards. Magnetic surveys measure subtle variations in the Earth’s magnetic field and can detect differences in the magnetic properties of rocks from ground level to many kilometers below. The data were acquired and processed by Xcalibur Smart Mapping under contract to Fugro and the USGS. Data collection took place November 2023 to May 2024 using a combination of fixed-wing airplanes and helicopters. Pre-planned flight lines were flown in an E-W direction with 250-m line spacing; N-S tie-lines were flown with 2500-m line spacing. The nominal flight height of 120 meters (m) above ground, with areas having higher population densities flown at a nominal height of 330 m above ground for safety reasons. The survey was flown in two discontinuous blocks, with a total of 94,172 km in a northern block and 27,010 in a southern block, for a total of 121,182 linear kilometers of data. Details regarding the flights and data processing are described in the contractor report provided on the landing page of this release.