This dataset contains the well-location information and water-level measurements for 930 wells from 10 confined aquifers of the New Jersey Coastal Plain. Well-location and water-level data is publicly available from the U.S. Geological Survey (USGS) Water Data for the Nation database (USGS, 2025). Water-level measurements from 3 wells in Pennsylvania and reported water-level measurements from 18 wells in Delaware (Delaware Geological Survey [variously dated]) also are included. All measurements were collected from mid-October 2018 to early April 2019 and used to construct potentiometric-surface maps for the confined Cohansey aquifer, Rio Grande water-bearing zone, Atlantic City 800-foot sand, Piney Point aquifer, Vincentown aquifer, Wenonah-Mount Laurel aquifer, Englishtown aquifer system, and upper, middle, and lower aquifers of the Potomac-Raritan-Magothy (PRM) aquifer system. This dataset also contains shapefiles of the potentiometric surface contours for the 10 confined aquifers. The potentiometric-surface contours show altitudes at which water levels would have risen in tightly-cased wells and represent conditions in October 2018 through early April 2019. This data release supports Fiore, A.R., Cauller, S.J., and Brown, E.J., 2025, Potentiometric surface maps and groundwater-level hydrographs for confined aquifers of the New Jersey Coastal Plain, 2018: U.S. Geological Survey Scientific Investigations Report 2025-XXXX, XX p., 9 pl., https://doi.org/10.3133/sir2025xxxx. References Cited: Delaware Geological Survey, [variously dated], Recent and historical groundwater level data: Delaware Geological Survey web page, accessed June 3, 2025, at http://data.dgs.udel.edu/sites/groundwater/recent-and-historical-groundwater-level-data.html. U.S. Geological Survey, 2025, USGS Water Data for the Nation: U.S. Geological Survey National Water Information System web interface (NWIS), U.S. Geological Survey, accessed May 22, 2025, at https://doi.org/10.5066/F7P55KJN.