Korbly was elected as a Democrat to the Sixty-first, Sixty-second, and Sixty-third Congresses (March 4, 1909 – March 3, 1915). He served as chairman of the Committee on Railways and Canals (Sixty-second Congress). He was an unsuccessful candidate for reelection in 1914 to the Sixty-fourth Congress.
Korbly was elected as a Democrat to the Sixty-first, Sixty-second, and Sixty-third Congresses (March 4, 1909 – March 3, 1915). He presided over the Railways and Canals Committee in the Sixty-second Congress and lost his attempt to return to the Sixty-fourth Congress in 1914.