County profile · Missouri
St. Charles County, MO market data
Population, household spending and competition for 56 business types in St. Charles County, each scored against other counties.
- Population, 2025
- 426,499
- +4.9% since 2020
- Households
- 161,311
- Median household income
- $104,692
- +23.2% vs. 2015–2019, before inflation
- Median home value
- $320,800
- Jobs located here
- 167,185
- Highest market score
- 90
- Grocery and convenience stores, #49 of 2,402 scored counties
A site report maps the competitors on map listings around any address in St. Charles County by name and distance, and the households and spending within reach. Or open the report at the center of St. Charles County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
An estimated 426,499 people live in St. Charles County, in 161,311 households. Population estimates put the population change in St. Charles County from 2020 to 2025 at +4.9%, faster than the U.S. (+3.1%). The median household income in St. Charles County is $104,692 a year, 30% above the U.S. median of $80,734. That rose 23.2% from the 2015–2019 survey, before inflation.
Set against the U.S., households in St. Charles County spend the most on medical and dental services (an index of 129, where 100 is the U.S. average) and the least on vehicle insurance (90).
The highest Groundwork market scores in St. Charles County are for grocery and convenience stores (90), urgent care and walk-in clinics (88) and laundromats (88). St. Charles County ranks #49 of 2,402 scored counties for grocery and convenience stores.
St. Charles County is part of the St. Louis metro area. For its number of households, St. Charles County has the most map listings, relative to the U.S., for chiropractors (87% above the U.S. rate) and the fewest for laundromats (44% below the U.S. rate).
All 56 business types in St. Charles County
Highest Groundwork market score first. Each score compares St. Charles County with other counties for that business type, from 0 to 100. Spending per listing divides a whole spending line (all vehicle repairs, all eating out) by one type’s listings: the demand for each competitor, not a business’s revenue. Compare it across markets with its index, where 100 is the U.S. figure for the same type; the real estate types, whose line is all housing costs, show the index only. How the score works.
| Business type | Score | Rank among counties | Listings | Per 10k households | Spending per listing | Spending per listing vs. U.S. (100) | Official establishments |
|---|---|---|---|---|---|---|---|
| Grocery and convenience stores | 90 | #49 of 2,402 | 231 | 14.3 | $4.7M | 139 | 51 |
| Urgent care and walk-in clinics | 88 | #2 of 325 | 6 | 0.4 | $44.5M | 181 | 7 |
| Laundromats | 88 | #18 of 785 | 15 | 0.9 | $25.1M | 201 | 6 |
| Grocery stores | 88 | #69 of 2,070 | 68 | 4.2 | $16M | 172 | 48 |
| Convenience stores | 87 | #74 of 2,261 | 126 | 7.8 | $8.6M | 110 | 3 |
| Tire shops | 83 | #62 of 1,530 | 54 | 3.3 | $3.6M | 143 | 21 |
| Primary care and pediatrics | 81 | #79 of 1,656 | 64 | 4.0 | $4.2M | 234 | 195 |
| Gas stations | 81 | #129 of 2,358 | 126 | 7.8 | $3.7M | 157 | 114 |
| Electricians | 79 | #54 of 1,160 | 34 | 2.1 | $15.1M | 126 | 81 |
| Barbershops | 77 | #109 of 1,356 | 67 | 4.2 | $2.8M | 150 | 9 |
| Funeral homes | 75 | #138 of 1,472 | 20 | 1.2 | $1.1M | 164 | 11 |
| Coffee shops and cafes | 75 | #185 of 2,063 | 118 | 7.3 | $6.4M | 173 | 97 |
| Hair salons | 74 | #178 of 2,339 | 295 | 18.3 | $641K | 149 | 98 |
| Auto repair shops | 74 | #232 of 2,378 | 317 | 19.7 | $610K | 137 | 179 |
| Sit-down restaurants | 73 | #300 of 2,405 | 764 | 47.4 | $989K | 149 | 305 |
| Auto repair and car care | 72 | #302 of 2,401 | 564 | 35.0 | $343K | 128 | 260 |
| Dry cleaners | 71 | #59 of 507 | 18 | 1.1 | $20.9M | 134 | 15 |
| Pizza | 71 | #273 of 2,090 | 123 | 7.6 | $6.1M | 121 | 333 |
| Clothing and shoe stores | 71 | #354 of 2,087 | 193 | 12.0 | $2M | 154 | 101 |
| Restaurants and cafes | 71 | #367 of 2,405 | 1,443 | 89.5 | $524K | 141 | 738 |
| Optometrists and eye care | 70 | #199 of 1,302 | 68 | 4.2 | $3.9M | 125 | 37 |
| Bakeries and dessert shops | 70 | #266 of 1,889 | 135 | 8.4 | $5.6M | 135 | 108 |
| Clothing, shoes and laundry | 70 | #387 of 2,210 | 272 | 16.9 | $1.4M | 157 | 122 |
| Collision repair and body shops | 69 | #240 of 1,327 | 51 | 3.2 | $3.8M | 123 | 53 |
| HVAC and plumbing | 69 | #244 of 1,707 | 124 | 7.7 | $4.2M | 87 | 105 |
| Fast food and sandwich shops | 69 | #404 of 2,222 | 210 | 13.0 | $3.6M | 118 | 333 |
| Nail salons | 68 | #195 of 1,328 | 94 | 5.8 | $2M | 120 | 34 |
| Veterinarians | 68 | #328 of 1,485 | 71 | 4.4 | $2.3M | 86 | 43 |
| Property management | 67 | #174 of 910 | 32 | 2.0 | Index only | 145 | 64 |
| Martial arts and dance studios | 67 | #224 of 1,334 | 83 | 5.1 | $2.4M | 117 | 53 |
| Physical therapy | 67 | #280 of 1,422 | 85 | 5.3 | $3.1M | 131 | 81 |
| Yoga, Pilates and fitness studios | 66 | #134 of 777 | 33 | 2.0 | $5.9M | 146 | 65 |
| Car washes and detailing | 65 | #345 of 1,451 | 76 | 4.7 | $2.5M | 101 | 32 |
| Salons, barbers and spas | 65 | #466 of 2,385 | 623 | 38.6 | $304K | 143 | 194 |
| Pet grooming and boarding | 64 | #378 of 1,461 | 66 | 4.1 | $2.5M | 99 | 47 |
| Gyms | 64 | #399 of 1,792 | 144 | 8.9 | $1.4M | 104 | 65 |
| Pet businesses | 64 | #511 of 2,200 | 201 | 12.5 | $830K | 94 | 111 |
| Child care and preschools | 63 | #465 of 1,611 | 100 | 6.2 | $900K | 90 | 90 |
| Gyms, studios and classes | 63 | #491 of 2,088 | 260 | 16.1 | $751K | 113 | 118 |
| Spas and skin care | 62 | #454 of 1,769 | 156 | 9.7 | $1.2M | 138 | 48 |
| Dentists and orthodontists | 62 | #513 of 1,886 | 208 | 12.9 | $1.3M | 131 | 149 |
| Home repair trades | 61 | #554 of 2,057 | 259 | 16.1 | $2M | 82 | 226 |
| Doctors, dentists and clinics | 61 | #712 of 2,394 | 1,163 | 72.1 | $230K | 151 | 563 |
| Pest control | 60 | #223 of 699 | 25 | 1.5 | $9.3M | 91 | 22 |
| House cleaning | 52 | #373 of 847 | 42 | 2.6 | $5.5M | 87 | 103 |
| Oil change and quick lube | 50 | #255 of 479 | 19 | 1.2 | $10.2M | 74 | 20 |
| Pet stores | 50 | #486 of 974 | 48 | 3.0 | $3.5M | 77 | 21 |
| Landscaping and lawn care | 49 | #741 of 1,493 | 115 | 7.1 | $2M | 69 | 199 |
| Roofing and gutters | 47 | #670 of 1,177 | 101 | 6.3 | $5.1M | 60 | 40 |
| Real estate agents and brokers | 47 | #1,231 of 2,176 | 410 | 25.4 | Index only | 116 | 202 |
| Mortgage brokers and lenders | 46 | #515 of 887 | 80 | 5.0 | Index only | 83 | 29 |
| Chiropractors | 46 | #874 of 1,490 | 163 | 10.1 | $1.6M | 68 | 94 |
| Lawn, cleaning and pest control | 46 | #1,024 of 1,771 | 182 | 11.3 | $1.3M | 76 | 324 |
| Real estate | 45 | #1,355 of 2,229 | 537 | 33.3 | Index only | 111 | 361 |
| Home inspectors | 40 | #287 of 415 | 15 | 0.9 | Index only | 66 | 18 |
| Insurance agencies | 28 | #1,882 of 2,272 | 351 | 21.8 | $808K | 64 | 224 |
Household spending in St. Charles County
What households here spend in a year on each line, in total and per household, with the index against the U.S. average (100).
| Spending line | A year, all households | Per household | Index vs. U.S. (100) |
|---|---|---|---|
| Vehicle maintenance and repairs | $193.4M | $1,199 | 125 |
| Gasoline and other fuels | $472.1M | $2,927 | 113 |
| Food away from home | $755.6M | $4,684 | 115 |
| Groceries | $1.1B | $6,738 | 107 |
| Personal care products and services | $189.1M | $1,172 | 117 |
| Child care and other personal services | $90M | $558 | 96 |
| Memberships, classes and admissions | $195.2M | $1,210 | 123 |
| Medical and dental services | $267.1M | $1,656 | 129 |
| Pets | $166.8M | $1,034 | 114 |
| Clothing, shoes and related services | $376.7M | $2,335 | 114 |
| Vehicle insurance | $283.6M | $1,758 | 90 |
| Home repairs, maintenance and insurance | $514.9M | $3,192 | 106 |
| Lawn care, cleaning and other household services | $232.5M | $1,441 | 102 |
| Rent and homeowner costs | $2.6B | $16,029 | 96 |
Household spending is estimated from the incomes of the households in each neighborhood, using what households at each income spent nationally in 2024, adjusted for the region. It counts what residents spend, wherever they spend it.
Population and households in St. Charles County
- Population, 2025 estimate
- 426,499+4.9% since 2020
- Households
- 161,311
- Median age
- 40.8
- Homes lived in by their owners
- 81%
- Vehicles per household
- 2.0
- Land area
- 560 sq. mi.
- People per square mile
- 740
- Median household income
- $104,692+23.2% vs. 2015–2019, before inflation
- Average household income
- $129,305
- Median home value
- $320,800
- Jobs located here
- 167,185
- Daytime population
- 365,581Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Charles County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the competitors on map listings by name and distance, for any of the 56 business types.
Or open the report at the center of St. Charles County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardRelated markets
Nearest counties in Missouri 8
- St. Louis County, MO995,569 people
- Lincoln County, MO63,057 people
- Warren County, MO37,177 people
- St. Louis city, MO288,512 people
- Franklin County, MO105,950 people
- Jefferson County, MO229,458 people
- Montgomery County, MO11,426 people
- Pike County, MO17,711 people
Questions
How fast is St. Charles County, MO growing?
Population estimates put St. Charles County at 426,499 people in 2025, up 4.9% since 2020, faster than the U.S. (+3.1%). It has 161,311 households. Against the 2015–2019 survey, median household income rose 23.2%, before inflation.
How much do households in St. Charles County, MO spend?
Households in St. Charles County spend about $2.6B a year on rent and homeowner costs, $1.1B on groceries and $755.6M on food away from home. Relative to the U.S., household spending in St. Charles County runs highest on medical and dental services (an index of 129, where 100 is the U.S. average) and lowest on vehicle insurance (90).
Which business types have the highest market scores in St. Charles County, MO?
Of the business types scored in St. Charles County, grocery and convenience stores (90), urgent care and walk-in clinics (88) and laundromats (88) have the highest Groundwork market scores. For grocery and convenience stores, that ranks #49 of 2,402 scored counties.
How does St. Charles County, MO compare with the U.S.?
Median household income in St. Charles County is $104,692, 30% above the U.S. median of $80,734. The population rose 4.9% from 2020 to 2025, against +3.1% for the U.S. The median home value is $320,800, against $332,700 for the U.S. Against the U.S., map listings per household run highest for chiropractors (87% above the U.S. rate) and lowest for laundromats (44% below the U.S. rate).
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. All 56 business types have a score in St. Charles County, each ranked against other counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in St. Charles County. It maps the competitors on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
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Screening a site or an acquisition in St. Charles County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of St. Charles County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.