Hi,

A lot of US based OSM mappers are on the Slack channel which you can join here: https://osmus-slack.herokuapp.com/

There is also a US specific mailing list you can subscribe to: https://lists.openstreetmap.org/listinfo/talk-us

Hi, You can see some users, who seems to be active: http://resultmaps.neis-one.org/oooc?zoom=15&lat=41.7475&lon=-74.0794&layers=B0TFFFFFT