The Library of Congress has placed 700 Civil War portraits on Flickr, according to Research Buzz. They are available here.
This collection is all from one place — the Liljenquist family — and includes the frames of the pictures as well as the ambrotype and tintype photographs themselves. Many of the pictures are soldiers (including some portraits of African-American soldiers) but there are some civilian pictures here as well. There are also many group pictures, both of civilians and soldiers.
Some of the pictures are fairly dark and hard to see — or maybe it’s my monitor. If you want more detailed images than are available at Flickr, you can go back to LOC.gov and download archival-quality TIFFs, though they are a slow download. I downloaded one of 84MB and one of 116MB.
Thanks to BookofJoe for the link.
