The historical center of the community is found on Nelson Road (County Highway A-28), immediately east of the Union Pacific Railroad, which traverses the area on a northwest–southeast angle. The junction of Hartland Road (County Highway T-68) is found a short distance west of this grade crossing. In terms of geographic coordinates, the community is located at 42°21′49″N88°30′26″W / 42.36361°N 88.50722°W / 42.36361; -88.50722 (42.3636315, -88.5073165)[4] In terms of the Public Land Survey System, Hartland is located near the midpoint of the dividing line between Sections 22 and 23, Township 45 North, Range 6 East of the Third Principal Meridian. The heart of the old community is on the Section 23 side of the line.[5] Hartland is served by the Woodstock, Illinois 60098 post office.
Hartland CDP, Illinois – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
In addition to the rustic buildings of the old town, Hartland is home to the Hartland Township facility, 15813 Nelson Road; the McHenry County Division of Transportation office, 16111 Nelson Road; and the Valley Hi, County Nursing Home, 2406 Hartland Road.[8]