Open Knowledge in the United States is a collection of city meetups, and city and state Ambassadors and Initiatives. Join or start a meetup in your city! Our shared account on Twitter is @OKFNUS and we link to Ambassadors individually, here.
Open Knowledge itself enjoys many great partnerships in the US, such as use of our CKAN software at Data.gov, and partnering with Creative Commons, Public Library of Science, and Open Science Federation on P2PU courses in the School of Open.
Get to know Open Knowledge! at OKFN.org, and watch this talk by co-founder & director Rufus Pollock, at Code for America.