Merrimac, Illinois is a small unincorporated community in the historic Moredock Precinct of Monroe County, Illinois, United States. It is located in the American Bottoms, adjacent to the Mississippi River levee due south of that river's confluence with the Meramec. It takes its name from this river whose name was translated as 'Ugly Water' from Algonquian by French Jesuits in the area. However scholars of the language translate it as 'place of strong current', which would certainly seem consistent.

This article does not cite any sources. (October 2018)

Merrimac
Unincorporated community
Etymology: Meramec River
Merrimac Location of Merrimac within Illinois
Coordinates: 38°22′15″N 90°20′00″W
Country	United States
State	Illinois
County	Monroe
Precinct	15
Elevation	404 ft (123 m)
Time zone	UTC-6 (CST)
• Summer (DST)	UTC-5 (CDT)
Postal code	62295
Area code(s)	618

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