53033 FipsDecoder
50011 County FIPS Code

Franklin County

Vermont · County seat: St. Albans · Active county or equivalent

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FIPS code 50011 is Franklin County, Vermont. With a population of 50,101 (2022 ACS estimate), it ranks #5 in Vermont and #1001 nationally. Franklin County is part of the Burlington-South Burlington, VT. The state FIPS code for Vermont is 50. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.

County FIPS

50011

State FIPS

50

VT

Population

50,101

2022 ACS · #1001 nationally

Density

79.1/mi²

people per sq mile

Land Area

634

sq miles

Urban/Rural

Metro — under 250K population

RUCC 3

How This FIPS Code Works

50 011
50 = State FIPS (Vermont)
011 = County FIPS

The 5-digit FIPS code 50011 is formed by combining the 2-digit state identifier 50 (Vermont) with the 3-digit county identifier 011. Together they uniquely identify Franklin County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 50011

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 50011.

Median Household Income

$73,633

ACS B19013_001E

Poverty Rate

10.4%

ACS B17001 (below poverty level)

Median Age

40.6

ACS B01002_001E

Metropolitan Area

Adjacent Counties (4)

Counties that share a border with Franklin County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 50011.

Federal Datasets Using Code 50011

FIPS code 50011 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 50011 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.

Census ACS API — Python 50011
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:011",
    "in":   "state:50",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Franklin County, Vermont, income, pop, ...]
SQL — filtering by county FIPS 50011
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '50011';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '50'
  AND county_fips = '011';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 50011 is WRONG for this county
R — tidycensus 50011
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "50",
  county    = "011",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 50 (not 50) and 011 (not 11) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

ZIP Codes in Franklin 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 Franklin County. Why FIPS ≠ ZIP →

ZIP Code % in county
05441 100.0%
05481 100.0%
05483 100.0%
05485 100.0%
05488 100.0%
05447 100.0%
05448 100.0%
05450 100.0%
05454 100.0%
05455 100.0%
05457 100.0%
05459 100.0%
05476 100.0%
05478 100.0%
05471 92.7%
05444 39.0%
05464 24.4%
05468 17.2%

Other Counties in Vermont