In Portugal actualy are circulating the :
the 1$00 coin almost only on supermarkets not usualy seen.
Carlos A. C. Sousa
I was sure someone from the USA would respond to this, but if so I missed it, so
In the USA the following coins generally circulate:
1c, 5c, 10c, 25c
50c and $1 coins do not circulate much (you very rarely get them in change) but
are sometimes available at banks. Also the post office has installed new stamp
dispensers that give $1 coins in change, so these coins may start to circulate
more than they have been.