When did the US 1000 dollar bill go out of circulation?

Answer 1

Large-denomination bills were never formally taken out of circulation, but the last ones were printed in 1945 and the Federal Reserve stopped sending them to banks in 1969. By now any that were left have been grabbed by collectors. The largest bill still printed is $100.

In fact the Treasury has never withdrawn or demonetized any currency except for gold certificates, so even 1928 $1 bills are still legal tender. But the chances of finding anything like that in circulation are effectively zero.

In any case, it wouldn't make sense to try to spend one - aside from the questions it would raise, they're possibly worth much more to a collector. The most common ones (1934-A Federal Reserve Notes) sell for a couple of hundred above face value even when worn, and other series can be worth upwards of $15,000.

Answer 2

Bills larger than $100 have never been formally withdrawn or demonetized. so there was no specific date when they stopped circulating.

The last series of high-denomination bills was dated 1934 and was printed up till 1945. At that time prices were much lower than they are now so there was little demand for high-value bills so even then very few of them were in general circulation. However the bills were heavily used among criminals because they were a convenient way of moving large amounts of cash without leaving an easily-followed trail. In 1969 a presidential order was issued forbidding banks from distributing anything over $100 and requiring them to hold any that were received in deposit.