Gardiner is a city in Kennebec County, Maine, United States. The population was 5,800 at the 2010 census. Popular with tourists, Gardiner is noted for its culture and old architecture. Gardiner is included in the Augusta, Maine micropolitan New England City and Town Area.
Located at the head of navigation on the Kennebec River, Gardiner was founded as Gardinerstown Plantation in 1754 by Dr. Silvester Gardiner, a prominent Boston physician. Dr. Gardiner had made a fortune as a drug merchant, with one apothecary shop in Massachusetts and two in Connecticut, and became a principal proprietor of the Kennebec Purchase within the old Plymouth Patent. He proved a tireless promoter for his development, which once comprised over 100,000 acres (400 km2).
Dr. Gardiner induced a gristmill builder, saw millwright, house carpenter and wheelwright to settle here.