County ZIP codes · Puerto Rico · FIPS 72035

Cayey Municipio, PR ZIP Codes

Cayey Municipio, Puerto Rico has 3 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 2 residential and 1 for PO boxes or a single organization. 1 of the residential ones lie mainly in Cayey Municipio and 1 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $20,558 in 00784 (Guayama) to $29,971 in 00736 (Cayey) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Cayey Municipio?

The residential ZIP codes of Cayey Municipio (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

00784 · $21k 00736 · $30k

They carry 2 postal town names: Cayey, Guayama.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 2 residential ZIP codes in Cayey Municipio

1 ZIP code lies mainly in Cayey Municipio; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Cayey Municipio, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
00736	Cayey	45,306	825	$30k	$150k	92%

Partly in Cayey Municipio

Residential ZIP codes mainly in another county that reach at least 1% into Cayey Municipio, by their share here
						In this county
00784	Guayama	34,981	524	$21k	$109k	2%

Download the 3 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

2 ZIP codes of Cayey Municipio extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Cayey Municipio and in the neighboring counties
ZIP	In Cayey	Elsewhere
00736	92%	Cidra Municipio 8%
00784	2%	Guayama Municipio 97%; Patillas Municipio 1%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Cayey Municipio without a residential area (GeoNames postal codes)
ZIP	Postal name
00737	Cayey

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Cayey Municipio's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Cayey Municipio starts with 007.

Three-digit prefixes of Cayey Municipio's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Cayey Municipio's
Prefix	Sectional center	Here	All codes
007	San Juan, PR (SCF 006)	3	56

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.