📍 Where Ontario Sits on the Map

Ontario sits inside California, United States and ranks #29 of 1246 cities in California by population. Every distance on this page is a straight-line Great Circle (haversine) measurement — the shortest path a plane or signal would take between two GPS points, not the longer road-and-turns route a driver would actually cover. View the nearby cities, nearby states or nearby countries tables above.

📏 Reading the Distance Figures

• Miles (mi): the everyday unit in the US, UK and most aviation cockpits
• Kilometers (km): the metric standard used almost everywhere else, including most freight and shipping paperwork
• Nautical Miles (nm): the unit ships and aircraft actually navigate by
• Compass Bearing: the 16-point heading from Ontario to each place listed — see the distance tables above

🚚 Putting This Data to Work

• Route Planning: Build delivery loops or sales-visit circuits starting from Ontario outward to the closest towns first
• New-Market Scouting: Spot the nearest untapped urban centers before committing to a regional expansion
• Freight Estimating: Get a fast first read on road, rail or air distances before requesting an actual freight quote
• Warehouse Placement: Weigh a few candidate hub locations by how close each sits to Ontario and its neighbors
• Side-by-Side Comparison: Stack Ontario against nearby cities on population and land area — see population & area comparison and California city rankings

🌎 Beyond Ontario: States & Countries Nearby

Scroll down and this page also ranks the states closest to Ontario and the countries closest to Ontario by the same straight-line measurement. For the complete national picture, see every country bordering or near United States. Handy for cross-border import/export planning, scouting a new travel corridor or lining up emergency logistics across North America.

🧭 Making Sense of the Compass Bearing

Next to every distance sits a compass heading from Ontario, plotted on the 16-point rose (N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW). The rotating arrow marks the bearing angle (0°–360°, where 0°/360° is due north) — see it in action in the cities, states and countries tables above. It's the same reference pilots, sailors and long-haul truckers use to picture the layout around Ontario at a glance.

🎯 For Travelers Passing Through Ontario

If you're stringing together stops in California, the neighboring cities table above doubles as a rough day-trip planner from Ontario — shortest hops first. Pair it with the population and area data to gauge which nearby stop is worth the detour.