Jefferson County
New York · County seat: Watertown · Active county or equivalent
FIPS code 36045 is Jefferson County, New York. With a population of 117,445 (2022 ACS estimate), it ranks #25 in New York and #536 nationally. Jefferson County is part of the Watertown-Fort Drum, NY. The state FIPS code for New York is 36. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
36045
Population
117,445
2022 ACS · #536 nationally
Density
92.6/mi²
people per sq mile
Land Area
1,269
sq miles
Urban/Rural
Metro — under 250K population
RUCC 3
How This FIPS Code Works
The 5-digit FIPS code 36045 is formed by combining the 2-digit state identifier 36 (New York) with the 3-digit county identifier 045. Together they uniquely identify Jefferson County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 36045
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 36045.
Median Household Income
$62,782
ACS B19013_001E
Poverty Rate
12.8%
ACS B17001 (below poverty level)
Median Age
32.8
ACS B01002_001E
Metropolitan Area
Adjacent Counties (4)
Counties that share a border with Jefferson County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 36045.
Federal Datasets Using Code 36045
FIPS code 36045 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 36045 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:045",
"in": "state:36",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Jefferson County, New York, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '36045';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '36'
AND county_fips = '045';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 36045 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "36",
county = "045",
year = 2022
)ZIP Codes in Jefferson County
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 Jefferson County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 13615 | 100.0% |
| 13641 | 100.0% |
| 13643 | 100.0% |
| 13650 | 100.0% |
| 13651 | 100.0% |
| 13656 | 100.0% |
| 13659 | 100.0% |
| 13673 | 100.0% |
| 13674 | 100.0% |
| 13675 | 100.0% |
| 13685 | 100.0% |
| 13692 | 100.0% |
| 13693 | 100.0% |
| 13602 | 100.0% |
| 13603 | 100.0% |
| 13605 | 100.0% |
| 13606 | 100.0% |
| 13607 | 100.0% |
| 13611 | 100.0% |
| 13612 | 100.0% |
| 13616 | 100.0% |
| 13618 | 100.0% |
| 13622 | 100.0% |
| 13624 | 100.0% |
| 13628 | 100.0% |
| 13632 | 100.0% |
| 13634 | 100.0% |
| 13636 | 100.0% |
| 13637 | 100.0% |
| 13638 | 100.0% |
Showing top 30 of 43 ZIP codes by residential address share.