United States
- William Campbell (business executive), former CEO of Intuit
- William Campbell (general) (1745–1781), Virginia militia general in the American Revolution
- William Campbell (NY surveyor) (c. 1767–1844), American physician, merchant, surveyor and politician from New York
- William W. Campbell (New York) (1806–1881), U.S. Representative from New York
- William B. Campbell (1807–1867), governor of Tennessee
- William Henry Campbell (1808–1890), president of Rutgers College
- William Wildman Campbell (1853–1927), U.S. Congressman from Ohio
- William Wallace Campbell (1862–1938), U.S. astronomer
- William March (1893–1954), born William E. Campbell, American soldier and novelist
- William Joseph Campbell (1905–1988), U.S. federal judge
- William C. Campbell (born 1923), former president of the United States Golf Association
- William Campbell (film actor) (1923–2011), American film and television actor
- Will D. Campbell (born 1924), American Baptist minister
- Bill Campbell (mayor) (born 1953), former mayor of Atlanta, Georgia
- Bill Campbell (illustrator), illustrator for the Hawk Model Company
- William Campbell (Medal of Honor, 1838) (1838–?), American Civil War sailor and Medal of Honor recipient
- William Campbell (Medal of Honor, 1840) (1840–1919), American Civil War soldier and Medal of Honor recipient
- Bill Campbell (sportscaster) (born 1923), sportscaster in the Philadelphia area
- Bill Campbell (California politician) (born 1942), Republican politician from California
- Bill Campbell (baseball) (born 1948), former Major League Baseball pitcher
- Billy Campbell (born 1959), American actor sometimes referred to as William O. Campbell or Bill Campbell
- Billy Campbell (TV executive) (born 1959), American TV executive producer
- Billy Campbell (baseball) (1873–1957), baseball player
- William Campbell (filmmaker), television and film producer, documentary filmmaker, and photojournalist
- William D. Campbell (1907–1995), world leader of the Boy Scouts
- William Hunter Campbell (1839–1862), Ohio civilian who worked for the Union Army during the American Civil War
- William M. Campbell, president of Discovery Networks U.S.
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Famous quotes related to united states:
“The city of Washington is in some respects self-contained, and it is easy there to forget what the rest of the United States is thinking about. I count it a fortunate circumstance that almost all the windows of the White House and its offices open upon unoccupied spaces that stretch to the banks of the Potomac ... and that as I sit there I can constantly forget Washington and remember the United States.”
—Woodrow Wilson (1856–1924)
“A sincere and steadfast co-operation in promoting such a reconstruction of our political system as would provide for the permanent liberty and happiness of the United States.”
—James Madison (1751–1836)
“... the yearly expenses of the existing religious system ... exceed in these United States twenty millions of dollars. Twenty millions! For teaching what? Things unseen and causes unknown!... Twenty millions would more than suffice to make us wise; and alas! do they not more than suffice to make us foolish?”
—Frances Wright (1795–1852)
“Places where he might live and die and never hear of the United States, which make such a noise in the world,—never hear of America, so called from the name of a European gentleman.”
—Henry David Thoreau (1817–1862)
“Europe and the U.K. are yesterday’s world. Tomorrow is in the United States.”
—R.W. ‘Tiny’ Rowland (b. 1917)