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Jefferson County, MO

Pick an industry to see how saturated it is across Jefferson County's ZIP codes, compared with the U.S. average. All figures use Census ZBP 2023 + ACS 2024.

Auto repair

37–59 in Jefferson County
195–290%
of U.S. average Range spans bands

Pet care

14–42 in Jefferson County
101–275%
of U.S. average Range spans bands

Fast food

137–151 in Jefferson County
94–101%
of U.S. average Range spans bands

Restaurants

84–100 in Jefferson County
60–69%
of U.S. average Below average

Dentists

44–68 in Jefferson County
60–87%
of U.S. average Range spans bands

Day care

26–48 in Jefferson County
59–99%
of U.S. average Range spans bands

Beauty salons

25–49 in Jefferson County
55–99%
of U.S. average Range spans bands

Pharmacies

9–37 in Jefferson County
40–146%
of U.S. average Range spans bands

Coffee shops

15–45 in Jefferson County
33–89%
of U.S. average Range spans bands

Grocery stores

8–40 in Jefferson County
23–106%
of U.S. average Range spans bands

Gyms

5–37 in Jefferson County
22–147%
of U.S. average Range spans bands

Bars

4–36 in Jefferson County
18–145%
of U.S. average Range spans bands

Nail salons

0–34 in Jefferson County
0–161%
of U.S. average Range spans bands

Clothing stores

0–34 in Jefferson County
0–198%
of U.S. average Range spans bands

Convenience stores

0–34 in Jefferson County
0–150%
of U.S. average Range spans bands

Car washes

0–34 in Jefferson County
0–280%
of U.S. average Range spans bands

Population, migration, and jobs

Population
231,888
Census PEP, July 1 2024
Change since 2020
+2.2%
+4,941 people
Net migration 2024
+953
international +121, domestic +832
Jobs located here
47,562
LODES 2022, −2.5% since 2019
Employed residents
109,254
LODES 2022, +1.0% since 2019
Net movers (IRS)
+1,701
tax year 2021–2022: 10,447 in, 8,746 out

Population. Census estimates 231,888 residents on July 1, 2024, 2.2% above 2020 (+4,941).

Latest year (2023→2024): births minus deaths −227, international migration +121, domestic migration +832. These are model-based estimates built from births, deaths, and migration, revised annually — not a census count, and they can differ from the ACS 5-year figure used elsewhere on the site. Components may not sum exactly because of rounding.

Jobs. LODES counts 47,562 jobs located in the county in 2022 (−2.5% since 2019) and 109,254 employed residents (+1.0% since 2019). A job and a worker are not the same thing: the first is measured at the workplace, the second at the home address, and one person can hold two jobs. Self-employed, military, and informal work are excluded.

Where movers come from and go. IRS matched individual tax returns between 2021 and 2022. 10,447 people (exemptions) moved into Jefferson County, reporting $354.0M in adjusted gross income; 8,746 moved out, reporting $293.1M. Net: +1,701 people.

Largest sources: St. Louis, MO (4,150) · St. Louis city, MO (968) · St. Charles, MO (466). Largest destinations: St. Louis, MO (2,942) · St. Louis city, MO (533) · Franklin, MO (533).

People are exemptions on matched returns — not a population estimate. Non-filers, dependents claimed elsewhere, and people whose address did not change are treated differently than in Census estimates. Tax data lag about two years.

Each source is reported at its own geography and year. None of them measures demand for a specific business type; they describe whether the local customer base and job base are expanding or shrinking. Definitions and limits →

How to read these numbers

Each percentage is the county's density of that business type per 10,000 people present (residents + 0.5×workers), divided by the U.S. average. 100% = exactly average.

Density is a supply-side signal. It does not measure foot traffic, income, tourism, or whether locals actually want more of a given business.

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BizGapMap — free, no-login small-business saturation reports for major U.S. counties. Built entirely from public U.S. Census, BLS, and IRS data (ZBP 2023, ACS 2024 5-year, PEP 2024, LODES, QCEW, IRS SOI). No forecasts, no revenue guesses — withheld cells are marked, and the few derived counts are labelled as estimates.