William Hebard (November 29, 1800 - October 20, 1875) was a United States Representative from Vermont. He was born in Windham, Connecticut. He attended the common schools and the Orange County Grammar School in Randolph, Vermont. He studied law, was admitted to the bar in 1827 and commenced practice in East Randolph, Vermont. Eventually, he served as prosecuting attorney of Orange County 1832-1836.
Hebard was a member of the Vermont House of Representatives in 1835. This was followed by service in the Vermont Senate in 1836 and 1838. He also was a judge of probate of Randolph district in 1838, 1840, and 1841 and again a member of the Vermont House of Representatives 1840-1842, 1858, 1859, 1864, 1865, and 1872. Returning to the bench, he was elected associate judge of the Vermont Supreme Court in 1842 and 1844.
Hebard moved to Chelsea, Vermont in 1845. He was elected as a Whig to the Thirty-first and Thirty-second Congresses (March 4, 1849 - March 3, 1853). Named a delegate, he was active at state constitutional convention in 1857 and he was again a member of the general assembly in 1858, 1859, 1864, 1865, and 1872. He resumed the practice of law and was named a delegate to the Republican National Convention in 1860. He died in Chelsea, Vermont in 1875 and was buried in the Old Cemetery, Randolph Center, Vermont.