Those would be houses with tax liens--though almost no tax liens are for just $1.
However, you certainly can buy houses for a few hundred dollars (tax liens) or a few thousand (some tax liens, some are just fixer-uppers in some parts of the country).
You can also become the owner of a home with no money out of pocket. There's a technique called "subject to" where you acquire the deed but the mortgage stays in the seller's name. (There's conventional 100% financing if you're a veteran, too.)
Parts of the country? All over, but lots of opportunities in Detroit, Baltimore, Indianapolis, areas of Atlanta, parts of West Virginia, and so on.
Hope that helps.
There were houses for $1 in Denver in the 1980s but owners had to live in the house a minimum of 2 years (to prohibit investors and landlords taking advantage) and improve the house significantly.
The cheapest homes I've seen in the Denver area today are $50,000 and quite a few tested positive for meth.
There are relatives who sell their homes to loved ones for $1 or something very cheap.
If you were a seller, why would you sell a house for $!?
Because you tried to sell it for more, and couldn't. Because there is something seriously wrong with it - maybe it needs hundreds of thousands of dollars of repairs, or back taxes.
That's not going to happen. Sometimes you will see advertising but the $1.00 is the starting point for an auction.
I heard you can do that, so where are they?