William B. Spencer | |
|---|---|
 | |
| Member of the U.S. House of Representatives from Louisiana's 5th district | |
| In office June 8, 1876 – January 8, 1877 | |
| Preceded by | Frank Morey |
| Succeeded by | John E. Leonard |
| Personal details | |
| Born | February 5, 1835 Catahoula Parish, Louisiana, U.S. |
| Died | February 12, 1882 (aged 47) Córdoba, Veracruz, Mexico |
| Political party | Democratic Party |
| Military service | |
| Allegiance |  Confederate States of America |
| Branch/service |  Confederate States Army |
| Rank |  Captain |
| Unit |  11th Battalion Louisiana Infantry, Company F[1] |
William Brainerd Spencer (February 5, 1835 – February 12, 1882) was an attorney and politician of the planter class, elected as U.S. Representative from Louisiana in 1876, in a contested election decided in his favor and against the Republican Party candidate. That year the Democratic Party regained control of the Louisiana state legislature.
He resigned when appointed in 1877 as Associate Justice of the Louisiana Supreme Court, serving until 1880. After that he resumed the practice of law.