"In God We Trust" is the official motto of the United States. It was adopted as the nation's motto in 1956 as an alternative or replacement to the unofficial motto of E pluribus unum, which was adopted when the Great Seal of the United States was created and adopted in 1782.
"In God We Trust" first appeared on U.S. coins in 1864 and has appeared on paper currency since 1957. A law passed in a Joint Resolution by the 84th Congress (P.L. 84-140) and approved by President Dwight Eisenhower on July 30, 1956 declared IN GOD WE TRUST must appear on currency. This phrase was first used on paper money in 1957, when it appeared on the one-dollar silver certificate. The first paper currency bearing the phrase entered circulation on October 1, 1957.
Some groups and people have expressed objections to its use, claiming it is a religious reference that violates the Establishment Clause of the First Amendment and should be removed from coins and currency.
It is also the motto of the U.S. state of Florida. Its Spanish equivalent, En Dios Confiamos, is the motto of the Republic of Nicaragua.
The phrase appears to have originated in "The Star-Spangled Banner", written during the War of 1812. The fourth stanza includes the phrase, "And this be our motto: 'In God is our Trust.'" This version of the motto made an early appearance on the twenty dollar interest bearing notes issued in 1864 along with the motto "God and our Right".
The Reverend M. R. Watkinson, in a letter dated November 13, 1861, petitioned the Treasury Department to add a statement recognizing "Almighty God in some form in our coins" in order to "relieve us from the ignominy of heathenism". At least part of the motivation was to declare that God was on the Union side of the Civil War. Treasury Secretary Salmon P. Chase acted on this proposal and directed the then-Philadelphia Director of the Mint, James Pollock, to begin drawing up possible designs that would include the religious phrase. Chase chose his favorite designs and presented a proposal to Congress for the new designs in late 1863.