List of United States clock companies

The following is a list of American companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name.

• Samuel Abbott; Montpelier, Vermont (1830–1861)
• Ansonia Clock Company; Ansonia, Connecticut and Brooklyn, New York (1851–1929)
• Attleboro Clock Company; Attleboro, Massachusetts (1890–1915)
• Bailey Banks & Biddle; Philadelphia, Pennsylvania (1832–1846)
• Birge, Gilbert & Co; Bristol, Connecticut (1835)
• Birge, Mallory & Co; Bristol, Connecticut (1837–1843)
• Birge, Peck & Co; Bristol, Connecticut (1830)
• Boardman & Dunbar; Bristol, Connecticut (1811)
• Boardman & Wells; Bristol, Connecticut (1832–1843)
• Brewster & Ingrahams; Bristol, Connecticut (1843–1852)
• Bridgeport Clock Company (? - 1853)
• Chauncey Boardman; Bristol, Connecticut (1813–1823)
• Chauncey Jerome; Bristol, Connecticut (1816–1853)
• Chelsea Clock Company; Boston, Massachusetts (1887–Present)
• Chicago Clock Manufacturing Company; Chicago, Illinois (ca. 1860–?)
• Colonial of Zeeland Clock Company; Zeeland, Michigan (1899–1986)
• David Wood; Newburyport, Massachusetts (1766–1824)
• Dyer, Wadsworth & Company; Augusta, Georgia (1838–1843)
• E. Howard & Co.; Boston, Massachusetts (1842–Present)
• E & A Ingrahams; Bristol, Connecticut (1852–1856)
• Elgin Watch Company; Illinois (1864-1968)
• Elias Ingraham; Bristol, Connecticut (1831–1841)
• Elias Ingraham & Company; Bristol, Connecticut (1857–1860)
• E Ingraham Company; Bristol, Connecticut (1884–1958)
• Eli Terry; Northbury, Connecticut (1795–1852)
• E N Welch Company; Bristol, Connecticut (1864–1903)
• F Kroeber; New York, New York (1870–1887)
• F Kroeber Clock Company; New York, New York (1887–1904)
• Franklin Clock Company; Philadelphia,Pa (1931-1962)
• General Electric
• General Time; Stamford, Connecticut (1930–2001)
• H.C. Thompson Clock Company; Bristol, Connecticut (1903-?)

Harris & Mallow, Lakewood, NJ

• Heman Clark; Plymouth Hollow, Connecticut (1783–1813)
• Heman Clark; Salem Bridge, Connecticut (1738–1838)
• Herschede Clock Company; Cincinnati, Ohio and Starkville, Mississippi (1885-1984)
• Hotchkiss and Benedict; Auburn, New York (ca. 1835)
• Howard Miller Clock Company; Zeeland, Michigan (1926–Present)
• Ingraham Company; Bristol, Connecticut (1958–1967)
• Jennings Brothers Manufacturing Corporation Bridgeport, Connecticut (? - ?)
• Joyce Bros. & Co.; Boston, Massachusetts, Providence, Rhode Island, and Portland, Maine (? - ?)

Lawson Clock Company, Los Angeles, California

• Luman Watson; Cincinnati, Ohio (1809–1834)
• Masterclock Inc.; St. Charles, MO (1994-Present)
• Munger and Benedict; Auburn, New York (ca. 1825)
• National Time and Signal; Wixom, Michigan (1877–Present)(Introduces the world's first pneumatically controlled master clock system.)
• New England Clock Company; New Haven, Connecticut (1959–2000)
• New Haven Clock Company; New Haven, Connecticut (1853–1959)
• Parker & Whipple; Meriden, Connecticut (1795–1868)
• Parker & Whipple Manufacturing Company; Meriden, Connecticut (1868–1893)
• Parker Clock Company; Meriden, Connecticut (1893–1934)
• Pomeroy, Noah; Bristol, Connecticut (1847-1878)
• Ray and Ingraham; Bristol, Connecticut (1841–1844)
• Reeves & Company; (1820 - ?)
• Ridgeway Clocks; Ridgeway, Virginia
• Riley Whiting; Winchester, Connecticut and Winstead, Connecticut (1808–1835)
• Samuel Whiting; Concord, Massachusetts (1808–1817)
• Salem Clock Company; Hartford, Connecticut
• Sangamo Electric Company; Springfield, Illinois (1899–1931)
• Self Winding Clock Company; New York City, New York (1886-1970)
• Sempire Clock Company; St.Louis, Missouri (1897-1908)
• Seth Thomas Clock Company (1807–Present)
• Sessions Clock Company; Bristol, Connecticut (1903–1969)
• Standard Electric Time Company; Waterbury, Connecticut, Springfield, Massachusetts, and Tecumseh, Michigan (1887–Present)
• Time Telegraph Company (1883–1887)
• United Clock Company; Peru, Illinois (1853–1887)
• Waltham Aircraft Clock Corporation; since 1994 in Ozark, Alabama, continuation of Waltham Precision Instruments Company
• Warren Clock Company, Ashland, Massachusetts; 1912-1946
• Waterbury Clock Company; Waterbury, Connecticut (1857–1967)
• Western Clock Company or Westclox; (1885–2001)
• William L Gilbert; Winsted, Connecticut (1841–1871)
• William L Gilbert Clock Company; Winsted, Connecticut (1871–1934)
• William L. Gilbert Clock Corporation; Winstead, Connecticut (1934–1964)
• Williams, Orton & Preston; Farmington, Connecticut (1830–1840)
• Wood Art for Living; Severn, Maryland (2009-Present)
• Weursch; Fall River, Massachusetts (1961-1995)