| Gideon J. Carpenter | |
| Office: | 21st Speaker of the California State Assembly |
| Term: | December 1875–April 1876 |
| Predecessor: | Morris M. Estee |
| Successor: | Campbell Polson Berry |
| Office1: | Member of the California State Assembly from the 23rd district |
| Term1: | 1875–1878 |
| Office2: | Member of the California State Senate from the 18th district |
| Term2: | 1856–1860 |
| Birth Name: | Gideon Judd Carpenter |
| Birth Date: | May 4, 1823 |
| Birth Place: | Harford, Pennsylvania, U.S. |
| Death Date: | May 6, 1910 (age 87) |
| Death Place: | Placerville, California, U.S. |
| Party: | Democratic |
| Spouse: | Mary A. Whitney |
| Children: | 4 |
| Relatives: | Cyrus C. Carpenter (brother) |
Gideon Judd Carpenter (May 4, 1823 - May 6, 1910) was a Democratic politician who served in the California State Senate and Assembly, also serving as the Speaker of the Assembly between 1875 and 1876. He was also the county clerk and district attorney of El Dorado County.[1]
Carpenter was born in Harford, Pennsylvania in 1823 and was the younger brother of future Governor of Iowa and Congressman Cyrus C. Carpenter. He moved to California in 1850 and became a miner in the Big Bar area of the Middle Fork American River but later shifted his focus to practicing law and being involved in politics.[2]
Carpenter was elected to the California State Senate from the 18th District in 1856 and served until 1860. He was then county clerk and district attorney of El Dorado County in California during the 1860s.
He returned to the state legislature when he was elected to the California State Assembly from the 23rd District in 1875, and was elected Speaker of the Assembly in the same year. In 1876 Carpenter stepped down from the Assembly to become the Democratic nominee in the 2nd Congressional District, but was defeated in the general election by Republican incumbent Horace F. Page.
After losing the congressional race, Carpenter was a reporter for the California Supreme Court until 1880. In 1882, he was elected to a single four-year term on the California Railroad Commission, now the California Public Utilities Commission.
In 1889, Carpenter purchased the Placerville Mountain Democrat, a newspaper, alongside George E. Williams and became the sole owner in 1891. Carpenter's son died in 1902, and Carpenter himself died in 1910 in Placerville.