| ZIP Codes: | 2 ZIP Codes (1 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 787 / 939 |
| Timezone: | GMT -04:00 |
| Local Time: | 2:13:34 PM |
| Population: | 45,306 [See All] |
| FIPS: | 72035 |
| CBSA: | San Juan-Bayamon-Caguas, PR |
| Land Area: | 53 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 18.1181, -66.1500 |
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45,306 residents live across 2 ZIPs covering 53 sq mi, served by 1 distinct USPS-recognized cities.
Population moved from 51,116 to 45,306 from 2014 to 2024 — a -11.4% change. 0 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 00736 (Cayey, $29,971 median) and poorest ZIP 00736 (Cayey, $29,971) are 0.0 miles apart — a 1.0× income gap across local geography.
Within Puerto Rico, this is the #18 most populous of 78 counties and ranks #10 for median household income .
Weighted by population, the typical household earns about $29,971 across the county — reflecting what a typical resident sees, not a simple ZIP average.
1 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
Cayey County lost 11.4% of residents between 2014 and 2024. ZIPs that shed the largest share: