The best digital cameras for older folks are easy to use and easy to hold, with clear controls. It must also have a simple method for downloading photos from the camera — I can tell you from experience that if it isn't very obvious how to do it, your elderly friend or parent is never going to bother getting those images off the card and onto Facebook.
Kodak EasyShare is often cited as a great camera for the elderly because it's considered easy to use, but I disagree. The Kodak computer software, which innocents will install without a second thought, downloads the camera's images in a proprietary format that's difficult for the uninitiated to convert to any usable form.
Keeping that in mind, I'm recommending the Panasonic Lumix DMC-ZS7. It lists for $349.95 but can be found for $249.95. It has a 3-inch display that reviewers praise for being clear and crisp even in direct sun, a side grip that makes it easy to grab and hold on to, and easy to navigate menus — all excellent when purchasing a camera for a senior.
The Lumix DMC-ZS7 isn't just for seniors, though. It's one of the highest-rated cameras on Amazon, with a Leica lens, 12x optical zoom, intelligent auto settings for many photography situations, and just plain quality images. And while it does use a rechargeable battery, reviewers report that its charge lasts about as long as AA batteries do.
The Lumix DMC-ZS7 sells for about $249.