Andrew Bray Dickinson (August 29, 1801 – April 21, 1873) was an American politician from New York.
Dickinson was born on August 29, 1801, in Mendham, Morris County, New Jersey, the son of Gamalial Dickerson (1776–1851) and Elizabeth (Jennings) Dickerson (1800–1858). The family removed to Covert, New York when Andrew was still a young boy. In 1820, he married Hannah Hopkins (1803–1849), and they had seven children. The young couple removed to a farm in the Town of Painted Post, in Steuben County, located in the area which was separated in 1826 as the Town of Hornby. Dickinson was elected the first Supervisor of the town.
He was a Jacksonian member of the New York State Assembly (Steuben Co.) in 1830.
He was a Whig member of the New York State Senate (6th D.) from 1840 to 1843, sitting in the 63rd, 64th, 65th and 66th New York State Legislatures.
He was again a member of the State Senate (26th D.) in 1854 and 1855. He was a delegate to the 1856 Republican National Convention. On June 18, 1857, he married Mary Abigail (Roloson) Ganung (1832–1904), and they had two children.