California

Distance from Ontario to Riverside

Straight-line distance

13.9mi

Ontario, CA and Riverside, CA are 13.9 miles (22.4 km) apart in a straight line. From Ontario, the shortest path starts out heading ESE (120°).

kilometers
22.4
nautical miles
12.1
heading from Ontario
120° ESE
heading from Riverside
300° WNW
OntarioRiverside

Orange line: great-circle path · ring: midpoint

How far Ontario is from Riverside

The great-circle distance between the Census internal points of Ontario and Riverside is 13.9 miles, 22.4 km or 12.1 nautical miles. That is the shortest path over the Earth's surface, computed with the haversine formula on a sphere with the mean Earth radius, 6,371.0 km. A course held on one compass bearing (a rhumb line) would be 13.9 miles, practically the same at this range.

Measurements

Miles
13.9
Kilometers
22.4
Nautical miles
12.1
Bearing from Ontario
119.5° ESE
Bearing arriving at Riverside
119.7°
Bearing from Riverside
299.7° WNW

Halfway between Ontario and Riverside

The great-circle midpoint is at 33.987895, -117.498738 (33°59'16.42"N 117°29'55.46"W). The nearest incorporated place of 1,000 or more people is Jurupa Valley, CA, with 108,154 residents, 2.1 miles from the midpoint. To find towns near the midpoint of any two places, use the halfway tool.

Time zones and daylight

Both use America/Los_Angeles, so there is no time difference. On June 21, Ontario gets 14 h 26 min of daylight and Riverside 14 h 25 min; on December 21, 9 h 53 min and 9 h 54 min. The two sit at nearly the same latitude, so their day lengths match closely all year.

Population compared

Riverside has 1.7 times the population of Ontario. From July 2020 to July 2024, Ontario changed by +5.4% and Riverside by +2.6%. Both are in California.

  1. 01Ontario, CA185,285 (+5.4%)
  2. 02Riverside, CA323,757 (+2.6%)
July 1, 2024 population and change since July 2020, Census Vintage 2024.

Questions people ask

How far is Ontario from Riverside?

13.9 miles, 22.4 km or 12.1 nautical miles along the great circle between the two Census internal points. Road distance is longer.

Which direction is Riverside from Ontario?

ESE. The great-circle path leaves Ontario on a bearing of 119.5° and arrives at Riverside on 119.7°. The return trip starts on 299.7°.

What is halfway between Ontario and Riverside?

The midpoint is at 33.987895, -117.498738. The nearest incorporated place of 1,000+ is Jurupa Valley, CA, 2.1 miles from it.

Is there a time difference between Ontario and Riverside?

Both use America/Los_Angeles, so there is no time difference.

Which is bigger, Ontario or Riverside?

Riverside, with 323,757 residents in July 2024 against 185,285 for Ontario, 1.7 times as many.

Sources and data as of

Data as of: Census 2024 Gazetteer internal points and Vintage 2024 estimates; time zones from Open-Meteo.

  1. 01Census 2024 Gazetteer, places
  2. 02Census Vintage 2024 subcounty population estimates
  3. 03SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
  4. 04IANA time zone database (clock times and daylight saving rules)

How every number is computed: methodology. Spotted a wrong figure? Report an error.