San Lorenzo Municipio
Puerto Rico · County seat: San Lorenzo · Active county or equivalent
FIPS code 72129 is San Lorenzo Municipio, Puerto Rico. With a population of 37,552 (2022 ACS estimate), it ranks #27 in Puerto Rico and #1252 nationally. San Lorenzo Municipio is part of the San Juan-Bayamón-Caguas, PR. The state FIPS code for Puerto Rico is 72. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
72129
Population
37,552
2022 ACS · #1252 nationally
Density
707.1/mi²
people per sq mile
Land Area
53
sq miles
Urban/Rural
Metro — 1M+ population
RUCC 1
How This FIPS Code Works
The 5-digit FIPS code 72129 is formed by combining the 2-digit state identifier 72 (Puerto Rico) with the 3-digit county identifier 129. Together they uniquely identify San Lorenzo Municipio in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 72129
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 72129.
Median Household Income
$19,629
ACS B19013_001E
Poverty Rate
45.3%
ACS B17001 (below poverty level)
Median Age
43.8
ACS B01002_001E
Metropolitan Area
Adjacent Counties (7)
Counties that share a border with San Lorenzo Municipio. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 72129.
Federal Datasets Using Code 72129
FIPS code 72129 appears as the county identifier in the following federal datasets. Analysts joining data across these sources use this code as the common geographic key.
Using FIPS Code 72129 in Code
Common patterns for querying federal datasets by this county's FIPS code. The leading zeros are significant — always treat FIPS codes as strings, not integers.
import requests
url = "https://api.census.gov/data/2022/acs/acs5"
params = {
"get": "NAME,B19013_001E,B01003_001E",
"for": "county:129",
"in": "state:72",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [San Lorenzo Municipio, Puerto Rico, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '72129';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '72'
AND county_fips = '129';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 72129 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "72",
county = "129",
year = 2022
)ZIP Codes in San Lorenzo Municipio
ZIP codes do not align perfectly with county boundaries — a single ZIP code can span multiple counties, and a county can contain parts of many ZIP codes. The ratios below (from the Census 2020 ZCTA relationship file) show the land area share of each ZCTA that falls within San Lorenzo Municipio. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 00754 | 100.0% |
| 00778 | 6.0% |
| 00725 | 2.8% |
| 00777 | 0.8% |