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Born in Panola County, Mississippi, Glascock moved to California in 1856 with his parents, who settled in San Francisco. He attended the public schools and graduated from the University of California at Berkeley in 1865. He studied law at the University of Virginia at Charlottesville. He was admitted to the bar by the supreme court of California in 1868 and commenced practice in Oakland, California. He was admitted to practice before the Supreme Court of the United States in 1882. He served as district attorney of Alameda County, California from 1875 to 1877.
Glascock was elected as a Democrat to the Forty-eighth Congress (March 4, 1883 – March 3, 1885). He was an unsuccessful candidate for reelection in 1884 to the Forty-ninth Congress. He served as mayor of Oakland, California from 1887 to 1890. He resumed the practice of law in Oakland. He died at his country home in Woodside, California, November 10, 1913. He was interred in Mountain View Cemetery, Oakland, California.
- United States Congress. "John R. Glascock (id: G000229)". Biographical Directory of the United States Congress.
This article incorporates public domain material from the Biographical Directory of the United States Congress website http://bioguide.congress.gov.
|U.S. House of Representatives|
| Member of the U.S. House of Representatives
from California's at-large congressional district
March 4, 1883 - March 3, 1885