The Currency of the United States in Steven Universe consists of bills and coins.
Bills closely resemble the real-life United States banknotes. Each bill is a green, rectangular piece of paper. On the obverse side, a number word is printed in the middle for most denominations; the $100 bill displays the numeral here instead of the word. To the left and right of the number are the designs of an upside down diamond and a snake, respectively. In each of the four corners of a bill is a numeral. The words "UNITED STATES OF AMERICA" are centered at the top and "[NUMBER] DOLLAR" centered at the bottom. The reverse side appears to be blank. The known denominations are $1, $2, $3, and $100.
Nickels, quarters, and silver dollars are silver/white in color. As seen in "Keep Beach City Weird", some coins have an engraved image of a coiled snake on one side and a shield superimposed on a star on the opposite side. As seen in "Arcade Mania", quarters and silver dollars appear to be engraved with a face that resembles Pearl on one side. Pennies are presumably in circulation, though the only penny that has been seen in-show is the giant penny in Rose's Armory; it is copper in color and bears the United States' 2010 Union Shield design on one side.
Ronaldo Fryman tells Steven his theory about the symbols printed on the bills. According to Ronaldo, the snake on the right side of the dollar represents the Snake People's hold on the country. The diamond on the left symbolizes the Snake People's "underground mines... or their sharp teeth." Later, Ronaldo revises his theory of the diamond's meaning: "Polymorphic Sentient Rocks" (which, unknown to him, describes Gems). Ronaldo also says that Polymorphic Sentient Rocks are part of the Great Diamond Authority.
Steven sets up a stand to give out Watermelon Stevens for free. Sadie, however, insists on paying for one, leading to other citizens to follow suit.
Stevonnie buys two donuts for themself to eat, but Sadie and Lars let them keep their money, saying it's on the house.
While Greg is singing "I Think I Need a Little (Change)" at the Beach City Pier for money, a passerby drops a dollar bill into Greg's guitar case. This turns out to be the only money he earned, since two bottle caps and a button were the only other things inside.
- Three dollar bills are not currently used in the United States, but they did exist in several states in the country's formative years before a unified currency was created, and several fake three dollar bills have been created to satirize politicians and celebrities.
- The snake design seen on currency may be a reference to the significant use of snake symbols throughout the history of the United States.
- Benjamin Franklin's Join, or Die political cartoon depicts a snake. Franklin had also proposed the rattlesnake as the national animal in a satirical commentary in 1751; he more seriously suggested this in 1775.
- The Gadsden flag, used during the American Revolution, depicts a rattlesnake.
- The rattlesnake was used on the 20 dollar bill issued in 1778 by the state of Georgia.
- A rattlesnake appears on the seal and emblem of the United States Department of the Army.
- The dollar bill confirms Beach City is in America.
- The upside down diamond on the bill resembles Pink Diamond's gemstone.