WASHINGTON—The U.S. government, its vaults stuffed with 1.4 billion one-dollar coins bearing the likenesses of dead presidents, has had enough of them. It is going to curtail production.

"Nobody wants them," Vice President Joe Biden said Tuesday. That is for sure: The Mint says there are enough $1 coins sitting in Federal Reserve vaults to meet demand for a decade, and the inventory was on track to hit two billion by 2016.

More than 40% of the coins that are minted are returned to the government unwanted, the Treasury said. The rest apparently sit in vending machines—one of the few places they are widely used—or in the drawers of coin collectors.

What the coins don't do is get around much. In fact, the Mint has never had much luck with dollar coins. The Susan B. Anthony dollar (1979-1981, revived for one year in 1999) never caught on; some people said it was too close in size to the quarter. Neither did the Sacagawea Golden Dollars (2000-2008) or its successor, the Native American $1 Coin, which has the same front but a different back.

But that didn't discourage Congress. In 2005, it mandated that the Mint make $1 coins with the likenesses of the presidents, four each year between 2007 to 2016. So far, the Mint is up to James Garfield, the 20th president. Next up: Chester A. Arthur.