53033 FipsDecoder
23023 County FIPS Code

Sagadahoc County

Maine · County seat: Bath · Active county or equivalent

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FIPS code 23023 is Sagadahoc County, Maine. With a population of 36,868 (2022 ACS estimate), it ranks #12 in Maine and #1279 nationally. Sagadahoc County is part of the Portland-South Portland, ME. The state FIPS code for Maine is 23. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.

County FIPS

23023

State FIPS

23

ME

Population

36,868

2022 ACS · #1279 nationally

Density

145.3/mi²

people per sq mile

Land Area

254

sq miles

Urban/Rural

Metro — 250K–1M population

RUCC 2

How This FIPS Code Works

23 023
23 = State FIPS (Maine)
023 = County FIPS

The 5-digit FIPS code 23023 is formed by combining the 2-digit state identifier 23 (Maine) with the 3-digit county identifier 023. Together they uniquely identify Sagadahoc County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 23023

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 23023.

Median Household Income

$77,591

ACS B19013_001E

Poverty Rate

10.9%

ACS B17001 (below poverty level)

Median Age

46.7

ACS B01002_001E

Metropolitan Area

Adjacent Counties (4)

Counties that share a border with Sagadahoc County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 23023.

Federal Datasets Using Code 23023

FIPS code 23023 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 23023 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 23023
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:023",
    "in":   "state:23",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Sagadahoc County, Maine, income, pop, ...]
SQL — filtering by county FIPS 23023
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '23023';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '23'
  AND county_fips = '023';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 23023 is WRONG for this county
R — tidycensus 23023
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "23",
  county    = "023",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 23 (not 23) and 023 (not 23) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

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

ZIP Code % in county
04008 100.0%
04086 100.0%
04287 100.0%
04357 100.0%
04530 100.0%
04548 100.0%
04562 100.0%
04579 100.0%

Other Counties in Maine