Not enough information. Is it a half dollar? A private collectible?
If it's a half dollar, values are roughly:
1964 : $6
1965-69 : $2.50
1971-present : 50¢
If it's anything else, please post a new question with a more complete description.
One dollar. It's not a US Treasury issue. Someone took a real Washington bill and pasted JFK's picture on the front of it. They're sold as novelty items and "commemoratives" but have no real interest except to niche collectors. There are also $1 bills with pictures of Santa Claus, the Easter Bunny, George Bush, and other entities that may or may not exist.
There are quite a number of postage stamps that feature John F. Kennedy. You will need to identify the stamp using a catalog. This may involve learning about perforations, watermarks and colors as well as condition. The catalog will provide a value. The value is what a collector could expect to pay for a stamp in fine/very fine condition. If selling, most cases you would be lucky to get 75% of the catalog, unless it is very valuable, then an auction would be worth looking into. The most common American catalog for identification is Scott's. Others are Stanley Gibbons, Minkus and even the US Postal Service Catalog of stamps.
The value of a John F Kennedy stamp is actually highly dependent upon a number of things. A couple of these things would be the year and condition of the stamp.
Its value is no more than 50 cents. It has little value as a collectible. It is still readily available. It is still valid at its face value for postage.
Scott Number 1246 would cost about 15 cents used and 40 cents in mint condition. Not likely to find a dealer willing to buy one, but it could be used for postage.
It's nothing but a coincidental curiosity with little or no collector value.
There's no genuine JFK $1 bill. It's an ordinary Washington bill that someone altered and sold as a novelty. It has no extra value.
1 dollar
$640.00 USD
what is the value of a Canadian Centennial $1 bill
1 dollar
$1
The Bahamian Dollar is pegged 1:1 with the US Dollar, so a $1 Bahamas bill is worth exactly $1 US Dollar.
$1 just one dollar......
The face value of ANY bill or coin is simply another word for its denomination. Thus any $1 bill has a face value of a dollar, a $100 bill has a face value of one hundred dollars, and so on.The collector value of a bill or coin can be very different, depending on a number of factors. For more information about a 1923 $1 bill please see the question "What is the value of a 1923 US 1 dollar bill?"
The only bill fitting that description is a silver certificate. Please see the question "What is the value of a 1923 US 1 dollar silver certificate?" for more information.
$1