What is the Largest Us Dollar Bill?

The largest US bill currently made is the $100 bill. There were $500, $1000, $5,000 and $10,000 bills circulated before WW2 and they are still legal tended, but most are held by collectors. A $100,000 certificate was used in 1934, but that was for the federal reserve system and not for circulation. You can find more information here: