It's not cheap-- though probably no costlier than the printed atlas-- but the AniMap County Boundary Historical Atlas on CD also traces the outline of every county in the U.S. from the year it was erected. It starts with the original colonial or territorial settlement, too. It's often offered on Ancestry.com. According to this, Niagara (and most of the other counties west of modern-day Syracuse) were Six Nation Indian land until 1782 when it was added to Tryon County, which stretched from the Susquehanna to the St. Lawrence and Lake Erie and was renamed Montgomery in 1784. Massachussets claimed the land until 1786 as well. Ontario County was erected in 1789, from which Genesee was carved in 1802 and in turn Niagara in 1808. Niagara included what's now Erie County until 1821, and ceded some land to Erie in 1824. Cheers, Ron Kyser -----Original Message----- From: Chris Leonard Date: Saturday, September 09, 2000 11:26 PM Subject: Re: Where is Niagara County in 1790 census? If you don't know what land was part of what county and town when, you can spend a lot of time looking in the wrong place. There is an excellent atlas the name of which escapes my menopausal brain at the moment...they have it in all genealogical and most public libraries. It shows the counties of every state for every census. I photocopied all the maps for each state I was going to be doing research in for each census year. The web is fine but there are times you can't get to it or have trouble downloading something (it took me EIGHT tries to get onto the web tonight, i kept getting bumped!) >