County Location of New England Place Names
neatlas.huh.harvard.edu/NECounty
Digital Sanborn Maps 1867-1970
sanborn.umi.com
Genealogy.com: Family and Local Histories
www.genealogy.com
Historical County Lines
jrshelby.com/hcl
RootsWeb County Finder
resources.rootsweb.com/usa
United States Digital Map Library
www.rootsweb.com/~usgenweb/maps
US County Formation Maps 1643-Present
www.genealogyinc.com/maps/uscf.htm
USGenWeb
www.usgenweb.org
USGS Geographic Names Information System (GNIS)
geonames.usgs.gov