Box10

Iceland was considering the Canadian dollar but not seriously.

daniellam

Although they have their currency (ISK), they (at least the tourism industry) seems to prefer the EUR.

The Blue Lagoon charges customers in EUR when bookings are made online.

Some hotels quote rates in EUR and then at check out convert the amount to ISK.

cbn42

Here's a pretty comprehensive list: https://en.wikipedia.org/wiki/Curren...urrency_unions

FlyingHoustonian

As several have noted the US dollar is the official currency in El Salvador, Panama, and Ecuador, with both coins and currency circulating. Panama often still calls its currency the Balboa, but only the coin has the official title. As an aside, while in Manta, Ecuador I noticed they had many, many of the newer US dollar coins of the more golden hue in use, and they often turned a nasty black colour.

jbjelloid

Although Lesotho has its own currency the South African Rand is fully acceptable.

WorldLux

Belgium and Luxembourg had a currency union from 1921 to 2001. From 1946 onwards 1 BEF = 1 LUF.

x1achilles

Not what the question is.
There is no currency union between the U.S. and Canada.

x1achilles

You can pay at the Blue Lagoon in Kroner. Paying in Euro is a gimmick they use to maintain a more stable income. They'd likely drop that option like a hot potato if the Euro dropped against the ISK.
There is no currency union in Iceland with the Euro.

YVR Cockroach

Pegs are not the same as currency unions but the HKD has been pegged to the USD at around HKD 7.78-7.8 for some 3 decades.

The JOD has been roughly pegged to the USD at ~USD 1.4/JOD

Another peg (to the EUR/FRF) is the French Pacific Franc used in the French pacific possessions.

Back to currency unions, a little-know one is the United Kingdom where you have English Pounds (I'm not using the term British Pounds/GBP because they're issued by the Bank of England) as well as Scottish and Northern Irish ones (never physically seen one of the latter) which have the same identical value. Haven't looked up what Manx and the Channel Islands (boths parts of the U.. but not the EU) use.

Only the the Bank of England-issued bank notes are acceptable outside the U.K. however.

lhrsfo

And Scottish notes are not always welcome in England.

Badenoch

I've been back and forth between Scotland and England many times and have never found a problem either with Scottish pounds in England or English pounds in Scotland.

Efrem

I've had problems with Scottish banknotes in small shops and pubs in small English towns, though not in large stores, etc., in London or even a couple of notches down from London in size. "Clydesdale Bank? Wot's that, a horse?" I generally change my Scottish notes for English ones as soon as practical in England, usually the first weekday I'm in London. Bank tellers are never surprised at the request. They find it common and understand the reason.

nmh1204

Macanese pataca. They don't use dollars.

BuildingMyBento

Hong Kong's currency is also called dollar.

When I visited Zimbabwe in 2011, change was often given in US dollars, South African rand, and candy. Seems it's even more of a mess now.