Home > CA > San Mateo County > Loma Mar > Zip 94021

Zip Code 94021 — Loma Mar, CA

ZIP Code 94021 is associated with Loma Mar, CA, in San Mateo County. The listed population estimate is 321; estimated density is 11.3 people per square mile. Among records with population estimates, it ranks #28 of 29 in San Mateo County and #1585 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.250280, -122.249580)

Data MetricLocal Statistic
Postal / Zip Code94021
Primary CityLoma Mar
State / ProvinceCA
CountySan Mateo
Total Population321
Population Density11.3 people/sq mi
TimezoneAmerica/Los_Angeles

How 94021 Compares

MetricZIP 94021San Mateo County recordsCA records
Population estimate321713,109 (sum)39,286,245 (sum)
Population Density11.3 /sq mi----
County population rank#28 of 29----
State population rank#1585 of 1,762----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CA

ZIP CodeCityDistancePopulation estimate
ZIP 94020La Honda2.9 mi1,694
ZIP 94060Pescadero5.1 mi1,465
ZIP 94074San Gregorio7.4 mi126
ZIP 95006Boulder Creek7.7 mi7,561
ZIP 94028Portola Valley8.9 mi6,531

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →