According to the US Mint, the Government does still have a gold reserve stored mostly in Fort Knox in Kentucky, but there is some in New York and Colorado too.
Some facts from their site:
- Amount of present gold holdings: 147.3 million ounces.
- The only gold removed has been very small quantities used to test the purity of gold during regularly scheduled audits. Except for these samples, no gold has been transferred to or from the Depository for many years.
- The gold is held as an asset of the United States at book value of $42.22 per ounce.
- The Depository is a classified facility. No visitors are permitted, and no exceptions are made.
That last point is an interesting one. They are basically saying, yes we have it, and no you can't see it. Some conspiracy buffs claim no one has been allowed in there to audit how much they have in over 50 years leading them to speculate that they are bluffing.
Although the dollar is no longer tied to the gold standard, throwing that much gold into the market would definitely add fuel the volatility of the finance world, which already has it's share of volatility and isn't hungry for more.The impact on the price of the dollar would be quite complicated and hard to predict.