California
Distance from Richmond to San Mateo
Straight-line distance
27.2mi
Richmond, CA and San Mateo, CA are 27.2 miles (43.8 km) apart in a straight line. From Richmond, the shortest path starts out heading S (174°).
- kilometers
- 43.8
- nautical miles
- 23.7
- heading from Richmond
- 174° S
- heading from San Mateo
- 354° N
Orange line: great-circle path · ring: midpoint · thin lines: county borders
How far Richmond is from San Mateo
The great-circle distance between the Census internal points of Richmond and San Mateo is 27.2 miles, 43.8 km or 23.7 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 27.2 miles, practically the same at this range.
Measurements
- Miles
- 27.2
- Kilometers
- 43.8
- Nautical miles
- 23.7
- Bearing from Richmond
- 174.2° S
- Bearing arriving at San Mateo
- 174.3°
- Bearing from San Mateo
- 354.3° N
Halfway between Richmond and San Mateo
The great-circle midpoint is at 37.756303, -122.335534 (37°45'22.69"N 122°20'7.92"W). The nearest incorporated place of 1,000 or more people is Alameda, CA, with 78,795 residents, 4.2 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, Richmond gets 14 h 48 min of daylight and San Mateo 14 h 46 min; on December 21, 9 h 32 min and 9 h 34 min. The two sit at nearly the same latitude, so their day lengths match closely all year.
Population compared
Richmond has 1.1 times the population of San Mateo. From July 2020 to July 2024, Richmond changed by -0.7% and San Mateo by -2.5%. Both are in California.
- 01Richmond, CA115,353 (-0.7%)
- 02San Mateo, CA103,006 (-2.5%)
Questions people ask
How far is Richmond from San Mateo?
27.2 miles, 43.8 km or 23.7 nautical miles along the great circle between the two Census internal points. Road distance is longer.
Which direction is San Mateo from Richmond?
S. The great-circle path leaves Richmond on a bearing of 174.2° and arrives at San Mateo on 174.3°. The return trip starts on 354.3°.
What is halfway between Richmond and San Mateo?
The midpoint is at 37.756303, -122.335534. The nearest incorporated place of 1,000+ is Alameda, CA, 4.2 miles from it.
Is there a time difference between Richmond and San Mateo?
Both use America/Los_Angeles, so there is no time difference.
Which is bigger, Richmond or San Mateo?
Richmond, with 115,353 residents in July 2024 against 103,006 for San Mateo, 1.1 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.
- 01Census 2024 Gazetteer, places
- 02Census Vintage 2024 subcounty population estimates
- 03SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
- 04IANA time zone database (clock times and daylight saving rules)
How every number is computed: methodology. Spotted a wrong figure? Report an error.