Ancient Holed Coins
Many ancient coins we see today have holes in them. But it doesn't mean they were minted that way. In ancient societies (but also today), coins were worn as jewelry to show status. Many Roman and Greek coins contain drill holes where people attached them to a bracelet or necklace. The Chinese cast coins with square holes in the center, though. They used this format for millennia to come.
Obsolete Holed Coins in Europe
In the 20th Century, several European nations minted holed coins. French five, 10, and 25 centime pieces were minted with holes for much of the first half of the 20th Century. Similarly, Belgium had holed coins between World War I and World War II.
Obsolete Holed Coins in Asia
The Chinese used holed coins since the 6th Century B.C. People used the holes to string the coins together to create varying denominations. China gave up the holed coin in the early 20th Century. Vietnam and Japan copied this style of coin in their own countries.
Current Holed Coins
The one kina coin of Papua New Guinea is a holed coin in use today. Denmark uses coins with holes; the one krone, as well as the two and five kroner pieces. The five sentimos coin of Philippines has a hole in the center and is made of copper-coated steel. The five and 50 yen coins of Japan are popular coins with holes. All of these are still in circulation.