Montrose is a village in Effingham and Cumberland counties in the U.S. state of Illinois. The population was 201 at the 2010 census, down from 257 in 2000. Montrose is part of the Effingham, IL Micropolitan Statistical Area and the Charleston-Mattoon Micropolitan Statistical Area.The Effingham County portion of Montrose is part of the Effingham Micropolitan Statistical Area, while the small section that lies in Cumberland County is part of the Charleston–Mattoon Micropolitan Statistical Area.Montrose is located at 39°9′57″N 88°22′42″W / 39.16583°N 88.37833°W / 39.16583; -88.37833. Most of the village lies in northern Effingham County, although a small portion extends into southern Cumberland County. In the 2000 census, all of Montrose's 257 residents lived in Effingham County.U.S. Route 40, following the route of the former National Road, passes through the village, leading northeast 13 miles to Greenup and southwest 9 miles to Effingham.