Alphonso Lunt (September 6, 1837 – December 18, 1917) was a sergeant in the Union Army and a Medal of Honor recipient for his actions at the First Battle of Lexington during the American Civil War.

Rank and organization: Sergeant, Company F, 38th Massachusetts Infantry.

Place and date: At Opequon Creek, Virginia, September 19, 1864.

Citation: Carried his flag to the most advanced position where, left almost alone close to the enemy's lines he refused their demand to surrender, withdrew at great personal peril, and saved his flag.

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