Explore Markham, Illinois, with this interactive street and satellite map.
This page also offers TOPO MAPS — the official USGS topographic sheets — plus USGS aerial imagery, a labelled USNG grid overlay, a distance and bearing tool, and a GPS grid-reference readout. See How to Use This Map below.
This interactive map shows the street layout and satellite imagery for Markham, Illinois. Use the Map and Satellite buttons above to switch between street map and aerial imagery views. Use the + and − buttons to zoom in or out, or scroll your mouse wheel while holding the Control key to zoom. On a touchscreen, use a two-finger pinch gesture. Drag the map to pan to any area of Illinois or beyond.
Click ⛶ Fullscreen to expand the map to fill your screen. To return to the normal page view, press the Escape key, click the ✕ Exit Fullscreen button that appears above the map, or on a mobile device tap the back button (Android) or the close icon (iOS).
TOPO MAPS — NEW. Click the green 🔍 Search Maps button below the map to open a second map with a Base map row offering three choices. OSM is the standard OpenStreetMap street map. Topo shows the official USGS topographic maps from The National Map — contours, hydrography, land cover and shaded relief, the same mapping used for hiking, hunting and back-country navigation in the Adirondacks, the Catskills and the Finger Lakes. Imagery shows USGS aerial photography, mostly 1-metre NAIP. The search box finds any US town, county or landmark by name, so you are not limited to Markham.
Reading the map like a paper quad. Click Grid to overlay the U.S. National Grid (USNG), labelled along the edges exactly as a printed topographic sheet is — at normal zoom the squares are one kilometre across, so you can read a six-figure grid reference by eye and judge distance directly off the map. Click Measure, then tap two points, to get the distance between them together with the grid bearing in degrees and mils, the true bearing, and the magnetic bearing to set on a compass.
Click 📍 My position to take a single GPS reading from your device. It marks where you are and reports your position as a USNG grid reference as well as plain latitude and longitude — USNG being the format FEMA and US search and rescue teams work from — with a Copy position button so you can paste it straight into a text message. It takes one reading and stops, rather than tracking continuously, to conserve your battery. Note that map tiles need cell coverage, but a GPS reading does not — your coordinates stay correct even where the map itself cannot load.
| City | Markham |
| State | Illinois (IL) |
| County | Morgan County |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 41.600036 |
| Longitude | -87.690455 |
| Population | 11,661 |
| Density | 833.0 /km² |
| Incorporated | Yes |
| ZIP Codes | 62628, 60428 |
| Area Code | 217, 708 |
| County Seat | Jacksonville |
| School District | Bremen Community High School District 228 |
Markham unfolds across a flat, expansive reach of the Illinois prairie, where the horizon claims the sky with an unrelenting, horizontal grace. It lies 5.3 miles west of Jacksonville, IL (from Jacksonville, IL: bearing 279°T), and is situated 5.9 miles west-northwest of South Jacksonville. The Willow Branch cuts a quiet, unassuming path through this terrain, its waters tracing a slow line through the earth that has long defined the local topography. Two miles to the west, the rise of The Mound offers a singular, modest disruption to the otherwise unbroken level of the land, while the distant depression of Sugar Hollow suggests the subtle, glacial memory of the region. The light here in the late afternoon possesses a particular, heavy clarity, turning the grasses to a pale, metallic gold before the shadows lengthen across the suburban streets and the quiet, structured sprawl of the residential blocks.
Markham retains a character forged by the steady, industrious pulse of the Midwestern corridor, where the legacy of rail and road infrastructure continues to shape the local economy and the rhythm of daily transit. Residents often look toward the nearby Lenz Field & Sports Complex for recreation, a space that anchors the community’s social life amidst the broader, utilitarian grid of the surrounding counties. While the proximity to Lake Jacksonville provides a nearby basin for the eye to rest upon, the true life of Markham remains tethered to the movement of commerce and the persistence of its neighborhoods. It is a place that finds its identity in the pragmatic, everyday endurance of its people, echoing the quiet strength of a landscape that asks for little but offers a vast, open space for the work of building a life.
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This page provides an embedded street and satellite map of Markham, Illinois. Coordinates: 41.600036, -87.690455. Live weather conditions are sourced directly from the National Weather Service. Real-time local and world news feeds keep the page current.
Detailed location data for Markham includes the ZIP code (62628, 60428), telephone area code (217, 708), county seat of Morgan County (Jacksonville), and school district assignment (Bremen Community High School District 228).
Search Maps opens a second, independent map. It searches OpenStreetMap for any US town, county or landmark by name; offers USGS topographic maps and USGS aerial imagery as base layers; overlays a labelled U.S. National Grid (USNG) so the map can be read like a printed topographic quad; measures distance and grid, true and magnetic bearings between any two points; and takes a single GPS fix reporting your position as a USNG grid reference and as latitude and longitude. Map tiles require cell coverage, but a GPS position does not, so the coordinates remain correct even where the map cannot load.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity. Population figures are sourced from the 2020 US Census.
| Page generated | September 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Map layers | Google Maps; © OpenStreetMap contributors; USGS The National Map topographic and aerial imagery (public domain); magnetic declination from NOAA NCEI (World Magnetic Model) |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. |