There are many chapters around the country for the African American Historical & Genealogical Society (AAHGS) You can find them listed on the website AAHGS.org
In addition, on the Black Genealogy
Summit website you can find a comprehensive list of Afr. American genealogy and history focused sites. They are listed here:
http://www.blackgenealogysummit.com/blacksocieties.htmlHopefully you will find some groups that will interest you and assist you as well.
Also check out GenealogyWise.com and click on Groups then selecte the African Ancestored Group.
And the major site of them all----AfriGeneas.com
I hope this is helpful.
Angela Walton-Raji
http://africanrootspodcast.com