C
- C-A-C (1914–1915)
- Cady (1901)
- California (1899)
- California (1900–1902)
- California (1910)
- California (1923–1925)
- Caloric (1903–1904)
- Cameron (1903–1920)
- Campbell (1918–1919)
- Canda (1900–1902)
- Cannon (1902–1906)
- Cantono Electric (1904–1907)
- Car de Luxe (1906–1910)
- Car-Nation (aka Carnation) (1912–1915)
- Cardway (1923–1924)
- Carhart (1871)
- Carhartt (1910–1912)
- Carlson (1904)
- Carrol (see Compressed Air)
- Carroll (1908)
- Carroll Six (1921–1922)
- Carter Steam (1901)
- Carter Twin-Engine (1907–1908)
- Cartercar (1905–1916)
- Carthage (1914–1915)
- Case (1911–1927)
- Cavac (1910)
- C.B. (1917–1918)
- Ceco (1914–1915)
- Centaur (1902–1903)
- Central (1905–1906)
- Century (1900–1903)
- Century Electric (1911–1915)
- Century Steamer (1906)
- Century Tourist (1901)
- C-F (1907–1909)
- Chadwick (1904–1916; 1960)
- Chalfant (1905–1912)
- Chalmers-Detroit (1908–1910; Chalmers 1911-1924)
- Champion (1916)
- Champion (1919–1924)
- Chandler (1913–1929)
- Chapman Electric (1899–1901)
- Chase (1907–1912)
- Checker (1922–1982)
- Chelsea (1914)
- Chicago (1895–1899)
- Chicago (1902)
- Chicago Electric (1899–1901)
- Chicago Electric (1913–1916)
- Chicago Motor Buggy (1908)
- Chicago Steam Car (1905–1907)
- Chief (1908)
- Christie (1904–1910)
- Christman (1901–1905, 1907)
- Church-Field (1912–1913)
- Church Pneumatic (1913–1914)
- Cincinnati Steamer (1903–1904)
- CinO (1910–1913)
- Citicar (1974–1976)
- Clark (1901)
- Clark (1910–1912)
- Clark Electric (1903–1905)
- Clark Electric (1909–1910)
- Clark-Hatfield (1908–1909)
- Clarkmobile (1903–1904; Clark 1910-1911)
- Clark Steam Car (1900–1909)
- Classic (1916–1917, 1920)
- Cleburne (see Luck Utility)
- Clermont (see Coats Steam Car)
- Cleveland (1902–1904)
- Cleveland (1905–1909)
- Cleveland (1914)
- Cleveland (1919–1926)
- Cleveland Electric (1909–1910)
- Climber (1919–1924)
- Clinton E. Woods Electric (1897–1901)
- Clipper (1902)
- Clipper (1956)
- Clough Steamer (1869)
- Cloughley (1896–1903)
- Club Car (1910–1911)
- Clyde Special (see Coyote Special)
- Clymer (1908)
- Coates-Goshen (1908–1910)
- Coats Steam Car (1921–1923)
- Coey (1913–1917)
- Coggswell (1910–1911)
- Colburn (1906–1911)
- Colby (1911–1914)
- Cole (1909–1925)
- Colonial (1921–1922)
- Colonial Electric (1912)
- Colt (1907)
- Columbia (1897–1913)
- Columbia Electric (see Columbian Electric or Leader)
- Columbia Six (1916–1924)
- Columbian Electric (1914–1917)
- Columbus (1907–1908)
- Columbus Electric (1903–1915)
- Comet (1907–1913)
- Comet (1913–1914)
- Comet (1914)
- Comet (1917–1922)
- Comet (1946–1951)
- Commerce (1907–1908)
- Commerce (1922)
- Commercial
- Commodore (1921–1922)
- Commonwealth (1917–1922)
- Compound (1904–1908)
- Conrad (1900–1903)
- Continental (1907–1908)
- Continental (1910–1914)
- Continental (1914)
- Continental (1933–1934)
- Continental (1956–1957)
- Corbin (1904–1912)
- Corbin (1999–2003)
- Corbitt (1907–1914)
- Cord (1929–1932,1936–1937)
- Corinthian (1922–1923)
- Cornelian (1914–1915)
- Cornish-Friedberg (see C-F)
- Correja (1909–1914)
- Corwin (see Gas-au-lec)
- Cosmopolitan (1907–1910)
- Cotta Steam (1901–1903)
- Country Club (1903–1904)
- Courier (1904–1905)
- Courier (1909–1911)
- Courier (1923)
- Courier Clermont (1912) (see Courier)
- Covert (1902–1907)
- Coyote Special (1909–1910)
- Craig-Toledo (1907)
- Crane (1912–1914; Crane-Simplex 1922)
- Crane & Breed (1912–1917)
- Crawford (1904–1923)
- Crescent (1913–1914)
- Crestmobile (1901–1905)
- Cricket (1913–1914)
- Criterion (see Kitto)
- Crompton (1902–1905)
- Crosley (1939–1952)
- Crouch (1894–1900)
- Crow (1911; Crow-Elkhart 1911-1923)
- Crowdus Electric (1899–1902)
- Crown (1905–1907)
- Crown (1908–1910)
- Crown (1913–1914)
- Crowther (1915–1916; Crowther-Duryea 1917)
- Croxton-Keeton (1909–1910; Croxton 1911-1914)
- Cruiser (1917–1919)
- Culver (1905)
- Cunningham (1907–1936)
- Cunningham (1951–1955)
- Curtis (1920–1921)
- Cutting (1909–1913)
- C.V.I. (1907–1908)
- Cyclomobile (1920–1921)
Read more about this topic: List Of Defunct Automobile Manufacturers Of The United States