Explore Sarnia, Ontario, Canada, with this interactive street and satellite map. Use the Map and Satellite buttons above the map to switch views. You can “grab” the map and drag it to re-centre it, or use the + and − buttons to zoom in or out to street-level detail.
This page also offers TOPO MAPS — the Canada Base Map with Toporama contours — plus shaded relief, a labelled UTM grid overlay, a distance and bearing tool, and a GPS grid-reference readout. See How to Use This Map below. You will find live weather, local and world news further down the page.
Imagery © Google · for orientation only, not for navigation
This interactive map shows the street layout and satellite imagery for Sarnia, Ontario. 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 to zoom in and out.
Click ⛶ Fullscreen to expand the map to fill your screen for a larger view. To return to the normal page view, press the Escape key on your keyboard, 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).
Drag the map to pan to any area of Ontario or beyond. Switch to Satellite view to see high-resolution aerial photography of Sarnia and surrounding areas, including streets, buildings, parks and waterways.
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 Canada Base Map from Natural Resources Canada with Toporama contours layered over it — the CanVec topographic data behind the printed NTS sheets, and the mapping used for hiking, hunting, canoe routes and back-country travel. Relief shows shaded relief and hypsometric tints. The search box finds any Canadian town, county or landmark by name, so you are not limited to Sarnia.
Reading the map like a paper NTS sheet. Click Grid to overlay the UTM grid, 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 — which matters in Canada, where declination runs from about 20 degrees west in Newfoundland to 20 degrees east in the Yukon.
Click 📍 My position to take a single GPS reading from your device. It marks where you are and reports your position as a UTM/MGRS grid reference as well as plain latitude and longitude — the grid reference being what Canadian search and rescue 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.
Map search is available for a limited number of queries per session to manage costs. Be specific — search precisely for best results.
| Place | Sarnia |
| Type | City |
| Province / Territory | Ontario (ON) |
| Location | Lambton |
| Country | Canada |
| Latitude | 42.981389 |
| Longitude | -82.317778 |
| Population | 72,047 |
| Postal Code (FSA) | N7W |
| Area Code | 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905 |
| Importance | Large city |
| CGN ID | FEARV |
Sarnia is a city in Lambton, Ontario, Canada. It is classified as a large city. Sarnia is located at 42.9814°N, 82.3178°W.
Sarnia rests with a quiet, persistent presence upon the expansive shore of Lake Huron. It lies 62.8 km north-north-west of Chatham-Kent, ON (from Chatham-Kent, ON: bearing 346°T), and is situated 7.7 km south-west of Brights Grove. The land here carries a particular sharpness, where the horizon meets the water in a long, unbroken line that seems to hold the light of the setting sun long after the day has begun to fade. Just a short distance away, the Wawanosh Wetlands Conservation Area offers a retreat into a quieter, reed-lined silence, while the Bonnie Doon Creek winds its way through the nearby landscape, marking the terrain with subtle, earth-bound shifts in elevation. The air in Sarnia often tastes of the lake—a crisp, cool dampness that clings to the skin even when the streets are dry and the sun is high. The history of Sarnia is anchored in the movement of goods and the industry that grew alongside its position on the water. Large-scale infrastructure and manufacturing have long defined the economic engine of Sarnia, creating a skyline that is punctuated by the vertical silhouettes of refineries and the steady, purposeful hum of commerce. This industrial character is not merely a matter of economics; it is a weight that shapes the way the morning light catches the steel and concrete, lending the docks and transit corridors a stark, functional beauty. Life here is defined by the logistics of the border and the constant, rhythmic passage of vessels, a cycle of movement that provides a steady pulse for those who live and work within the frame of its busy port. Cultural life in Sarnia finds its expression in the resilience of its people and the quietude of its public spaces, where the legacy of the past lingers in the architecture and the local traditions of the waterfront. The community maintains a steadfast identity, one that values the practicalities of the northern climate and the seasonal shifts of the Great Lakes. Among those born in the region, individuals like the astronaut Chris Hadfield have brought a sense of vast, skyward ambition to the local consciousness, reflecting the same expansive spirit found in the view across the water. Sarnia remains a place of distinct clarity, where the intersection of industry and natural geography creates a singular, grounded experience for those who walk its streets and observe the changing moods of the lake.
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Explore Sarnia, Ontario, Canada, with an embedded street and satellite map — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 42.981389, -82.317778. Live weather conditions and 7-day forecasts — including hourly outlooks — are provided through Open-Meteo, while real-time local and world news feeds help keep the page current. Editorial summaries provide additional local information and context.
Detailed location data for Sarnia includes the postal code (N7W), telephone area code (226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905). These are among the most commonly searched location details for any Canadian city or town.
Search Maps opens a second, independent map. It searches OpenStreetMap for any Canadian town, county or landmark by name; offers the Canada Base Map with Toporama contours and shaded relief as base layers; overlays a labelled UTM grid so the map can be read like a printed NTS sheet; measures distance and grid, true and magnetic bearings between any two points; and takes a single GPS fix reporting your position as a UTM/MGRS 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 for Sarnia is sourced from the Canadian Geographical Names Database (CGN), Natural Resources Canada, and verified by coordinates rather than name matching alone. GPS coordinates, province, administrative location and place type are shown in the information panel above.
| Page generated | September 2026 |
| Location data | Canadian Geographical Names Database (CGN), Natural Resources Canada |
| Map layers | Google Maps; © OpenStreetMap contributors; Canada Base Map, Toporama and CBME © Natural Resources Canada (Open Government Licence — Canada); magnetic declination from NOAA NCEI (World Magnetic Model) |