What Is a Dollar Bill and Who Appears on It
The U.S. one-dollar bill is a Federal Reserve Note, the most widely circulated denomination in the United States. The portrait on the front is George Washington, the first U.S. president, and the bill is issued by the Federal Reserve System. The back features the Great Seal of the United States, with the obverse showing an eagle and the reverse showing an unfinished pyramid and the Eye of Providence. The current design series is the 2006 Series, which introduced updated security features and printing techniques. The Bureau of Engraving and Printing produces the notes at facilities in Washington, D.C., and Fort Worth, Texas, and the Federal Reserve distributes them to depository institutions. For background on the Federal Reserve's role, see the Federal Reserve's official overview Federal Reserve overview.
The one-dollar bill accounts for roughly half of all U.S. currency production by volume, reflecting its role as the primary transactional denomination. The Bureau of Engraving and Printing reports that the average life of a one-dollar bill in circulation is about 6.6 years, shorter than higher denominations because of heavy handling. The note measures 6.14 inches by 2.61 inches and weighs approximately 1 gram, with a composition of 75% cotton and 25% linen. The serial number, Treasury seal, and Federal Reserve seal are standardized across denominations, while the portrait and border design are unique to the one-dollar bill. The note is not redeemable for gold or silver, as the United States left the gold standard for domestic transactions in 1933, and the note is legal tender for all debts, public and private.
Security Features and Anti-Counterfeiting Measures
The 2006 Series one-dollar bill includes a portrait watermark of Washington visible from both sides when held to light, a security thread embedded in the paper, and microprinting around the portrait. The ink used for the numeral 1 in the lower right corner is color-shifting, appearing green when tilted and black when viewed straight on. The Bureau of Engraving and Printing also uses intaglio printing, which creates a raised texture that can be felt by touch, a feature counterfeiters find difficult to replicate. The Federal Reserve works with the U.S. Secret Service to monitor counterfeit trends and update detection equipment at financial institutions. The U.S. Secret Service's mission and history are detailed on its official page U.S. Secret Service currency investigations.
Counterfeit detection pens use iodine-based ink that reacts with starch in regular paper, turning dark on non-currency paper and remaining light on genuine cotton-linen substrate. The Federal Reserve Banks and commercial banks use automated currency scanners that check for magnetic ink patterns, thread fluorescence, and spectral signatures. The U.S. Currency Education Program provides public resources on identifying genuine notes, including high-resolution images and interactive tools. The Federal Reserve's Cash Product Office publishes annual reports on currency in circulation, including the one-dollar bill's share of total note value and volume. Additional details on currency production and security are available from the Bureau of Engraving and Printing Bureau of Engraving and Printing.
Bill Nye's Science Perspective on Everyday Currency
Bill Nye, the science educator known for his TV series and public advocacy, has discussed everyday objects through a scientific lens, including paper currency and its material properties. The cotton-linen blend used in U.S. bills is chosen for durability and resistance to tearing, with the fibers absorbing inks in a way that supports high-speed printing and long circulation life. The Bureau of Engraving and Printing's production process involves precise