FIPS code 36109 is Tompkins County, New York. With a population of 102,555 (2022 ACS estimate), it ranks #28 in New York and #591 nationally. Tompkins County is part of the Ithaca, 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
36109
Population
102,555
2022 ACS · #591 nationally
Density
216.1/mi²
people per sq mile
Land Area
475
sq miles
Urban/Rural
Metro — under 250K population
RUCC 3
How This FIPS Code Works
The 5-digit FIPS code 36109 is formed by combining the 2-digit state identifier 36 (New York) with the 3-digit county identifier 109. Together they uniquely identify Tompkins County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 36109
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 36109.
Median Household Income
$69,995
ACS B19013_001E
Poverty Rate
16.0%
ACS B17001 (below poverty level)
Median Age
32.6
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with Tompkins County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 36109.
Federal Datasets Using Code 36109
FIPS code 36109 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 36109 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:109",
"in": "state:36",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Tompkins County, New York, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '36109';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '36'
AND county_fips = '109';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 36109 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "36",
county = "109",
year = 2022
)ZIP Codes in Tompkins 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 Tompkins County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 14853 | 100.0% |
| 13102 | 100.0% |
| 14881 | 100.0% |
| 14850 | 100.0% |
| 14854 | 100.0% |
| 13062 | 100.0% |
| 13068 | 100.0% |
| 14882 | 100.0% |
| 14867 | 97.6% |
| 13073 | 97.6% |
| 14817 | 95.1% |
| 13053 | 57.7% |
| 14886 | 44.5% |
| 14883 | 30.1% |
| 13864 | 24.3% |
| 13736 | 20.1% |
| 13092 | 9.2% |
| 13045 | 6.1% |