On August 25, 2020, the U.S. Geological Survey conducted a bathymetry survey of a 550 meter long reach of the Black River near Great Bend, New York. The study reach began approximately 1,000 meters upstream from the State Route 26 bridge in Great Bend, New York. Depth data were collected primarily with a 1,200 kilohertz Teledyne RD Instruments RioPro acoustic Doppler current profiler (ADCP) with position data from differential global navigation satellite system (GNSS) Hemisphere V102 DGPS antenna (any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government). Water surface elevations were established using real-time kinematic (RTK) GNSS surveys; additional bathymetry points were also measured using RTK-GNSS. Quality assurance of the RTK-GNSS included observations of two documented benchmarks. Files included in this Data Release include shapefiles with detailed attribute tables and accompanying comma-separated values files of ADCP bathymetry points (BlackR_ADCPBeamDepths.shp and .csv), GNSS bathymetry points (BlackR_GNSS_BathyPoints.shp and .csv), and GNSS water surface elevation points (BlackR_GNSS_WSEPoints.shp and.csv), and a comma-separated values file of the GNSS benchmark occupation data (BlackR_GNSS_Benchmarks.csv).