Robert Stockton Williamson | |
|---|---|
 Robert S. Williamson | |
| Born | January 21, 1825 Oxford, New York, US |
| Died | November 10, 1882 (aged 57) San Francisco, California, US |
| Place of Burial | San Francisco Masonic Cemetery |
| Allegiance | United States Union |
| Service | United States Army Union Army |
| Years of service | 1848–1882 |
| Rank | Lieutenant Colonel |
| Unit | Corps of Engineers |
| Battles / wars | American Civil War |
Robert Stockton Williamson (January 21, 1825 – November 10, 1882) was an American soldier and engineer, noted for conducting surveys for the transcontinental railroad in California and Oregon. Inducted into the Army Corps of Engineers in 1861, he had a distinguished record serving in the American Civil War, winning two brevet promotions. When the US Army Corps of Engineers established its San Francisco District office in 1866, he was appointed as the first commander of the office. Formally promoted to the rank of lieutenant colonel in 1869, he retired in 1871, because of health problems, and died in San Francisco in 1882.