Adair is an unincorporated census-designated place (CDP) in McDonough County, Illinois, United States. Adair is part of the New Salem Township. The town is served by U.S. Route 136, and the Burlington Northern Santa Fe Railway runs through the town. Adair was laid out in August 1870 under the name of Reedyville; though the name has never been officially changed, the location is known as Adair because that name was given to the post office.[3] Adair has an estimated population of 201, down from 210 in the 2010 census.[4][5]

Adair, Illinois
Census-designated place (CDP)
Adair, Illinois Show map of Illinois Adair, Illinois Show map of the United States
Coordinates: 40°25′08″N 90°29′48″W
Country	United States
State	Illinois
County	McDonough
Area [1]
• Total	0.43 sq mi (1.11 km2)
• Land	0.43 sq mi (1.11 km2)
• Water	0.00 sq mi (0.00 km2)
Elevation	646 ft (197 m)
Population  (2020)
• Total	212
• Density	493.02/sq mi (190.51/km2)
Time zone	UTC-6 (Central (CST))
• Summer (DST)	UTC-5 (CDT)
ZIP code	61411
Area code	309
GNIS feature ID	403339[2]

Demographics

References

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