Alexander Hamilton Bullock (March 2, 1816 – January 17, 1882) was an American lawyer, politician, and businessman from Massachusetts. First a Whig and then a Republican, he served three terms (1866-69) as the 26thGovernor of Massachusetts. He was actively opposed to the expansion of slavery before the American Civil War, playing a major role in the New England Emigrant Aid Society, founded in 1855 to settle the Kansas Territory with abolitionists. He was for many years involved in the insurance industry in Worcester, where he also served one term as mayor.