Some records from the U.S. Consulate in Danzig are apparently kept at the National Archives: https://www.archives.gov/research/guide-fed-records/groups/084.html. The listed dates are only 1836-1916, though. The early 1920s are of particular interest to genealogists due to the large Jewish population transiting through Danzig then. I will inquire with the Archives and/or State Department about the location of later material, finding aids, and access conditions.

Many Jewish migrants at this time stayed in refugee camps in Neufahrwasser and Troyl, which were at least partly administered by the Joint Distribution Committee. Documentation from those refugee camps could potentially be very valuable genealogically, but am not aware of anything significant like name lists and my own inquiries have not been successful.

Logan Kleinwaks
JewishGen Research Director for Danzig/Gdańsk
lkleinwaks@...