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Web design and SEO in St. Charles County, MO
Websites, local SEO and AI search for small businesses in St. Charles County, including O'Fallon, St. Charles and St. Peters. Plans start at $199 a month with no setup fee, and your site launches in 3 to 6 weeks.
Who we build for in St. Charles County
Utilities
A good site has to make service requests and emergency contacts easy to find.
Finance & Insurance
A good site has to build trust with clear credentials and an easy way to book a consultation.
Professional Services
A good site has to show your credentials and make booking a consultation easy.
What St. Charles County's numbers mean for your website
Median household income in St. Charles County is about $106,000, higher than in most counties we serve.
Nationally, 97% of adults in households earning $100,000 or more own a smartphone, and 94% have home broadband (Pew Research Center, 2025).
We build light pages that load fast on a phone or a slower connection. Online estimate requests are included in every plan.
81% of St. Charles County households own their home, a higher share than in most counties we serve.
Nationally, 97% of consumers read reviews for local businesses (BrightLocal, 2026).
We can add a before and after gallery (included in Growth) and a review request page (included in every plan).
St. Charles County has 8 cities of 5,000 or more people, including O'Fallon, St. Charles and St. Peters.
Nationally, there was a 19% fall in "near me" searches from 2021 to 2024 as search engines work out local intent on their own (BrightLocal, 2025).
Service-area pages for your main cities count toward your page budget. Page budgets by plan.
Source: U.S. Census Bureau, American Community Survey 5-year estimates.
Client work near St. Charles County
Featured sites we built for businesses in this area, with the plan each one is on.
| Client | Plan | Lighthouse after launch |
|---|---|---|
| Stucky's Garage DoorsGarage door repair | Stand Up | 97 performance, 100 SEO |
| B. Woody's Tree ServiceTree service | Stand Up | 96 performance, 100 SEO |
| Archer SpacesHome organization | Stand Up | 99 performance, 100 SEO |
What you get in St. Charles County
- Plans from
- $199/mo on a 2-year term
- Setup fee
- None
- Launch
- 3 to 6 weeks
Hosting, SSL and monthly maintenance are included, with up to 8 content pages on the lowest plan. Site design licensed. Domain and content owned by client.
Will it pay for itself?
About the St. Charles County market
Whether you run a financial technology company in O'Fallon or a manufacturing business anywhere across St. Charles County, you're doing business in a county where technology and industry sit side by side. Mastercard operates a major technology center here, and businesses in finance, manufacturing, and services all compete for the attention of the same local customers.
Whether you run an auto-parts supplier in Wentzville or a logistics provider anywhere across St. Charles County, you're competing in a manufacturing corridor anchored by General Motors' Wentzville Assembly Plant. The plant has drawn a constellation of Tier 1 suppliers, including Lear Corporation and the Piston Group, feeding a local economy that needs every vendor, staffing agency, and service business to be findable online.
Whether you run a family medicine clinic in O'Fallon or a physical therapy practice anywhere across St. Charles County, you're serving patients across a county with plenty of healthcare options. SSM Health St. Joseph Hospital in St. Charles anchors a network of clinics that stretches across the county, meaning healthcare-adjacent small businesses here compete for referral traffic against a well-resourced health system with strong digital authority of its own.
St. Charles County is the fast-growing western edge of the St. Louis metro, with 414,535 residents. O'Fallon is the biggest city at 93,801, followed by St. Charles at 71,508, St. Peters at 59,092 and Wentzville at 47,061. Lake St. Louis, Dardenne Prairie, Cottleville and Weldon Spring add more. Household incomes run high here, the poverty rate is about 5 percent, and about 81 percent of households own their home. If you offer repairs, remodeling, landscaping or similar services, that homeownership rate means a large number of homes you could serve.
The county had 8,903 business establishments in 2022. Healthcare leads with 1,250, followed by Retail Trade with 1,071, Construction with 1,022 and Hospitality and Food with 848. Because Construction is so well represented, a contractor, roofer or tree service has plenty of neighbors competing for the same searches. A local site that names the city, shows real work and answers common questions can help a business be taken seriously. A site that names each of those cities gives a visitor a quick sign that you work nearby.
We know this market first hand. We built Stucky's Garage Doors in Wentzville, B. Woody's Tree Service in St. Charles and Archer Spaces, which serves St. Charles and St. Louis County. Those projects are examples of what a small service business can do with a clear site. Untap Web builds websites for businesses here and keeps working on local search and AI search. If you serve several cities, consider a site that speaks to each one you serve. Current plan prices are on the plans page.
- Population
- 414,535
- Metro area
- St. Louis
- ZIP codes served
- 9
- Highest-earning industry
- Utilities
Source: U.S. Census Bureau, American Community Survey 5-year estimates. Sources for each figure are listed under the full market data.
Full market data
Local market data
St. Charles County, MO. Census and industry figures, each with its source.
| Measure | St. Charles County |
|---|---|
| People and households, St. Charles County | |
| Population1 | 414,535 |
| Median household income12 | About $106,000 |
| Households that own their home1 | 81% |
| Median age1 | 39.6 |
| Cities of 5,000+1 | 8 |
| ZIP codes we serve3 | 9 |
| Metro | |
| Metro area1 | St. Louis, MO-IL |
| Metro population1 | 2,810,850 |
| Median earnings by industry, St. Charles County | |
| Utilities1 | $97,279 |
| Finance & Insurance1 | $88,764 |
| Professional Services1 | $86,621 |
- 1.U.S. Census Bureau, American Community Survey 5-year estimates (latest release in our data, 2023 to 2024), via Data USA.
- 2.Median household income is our estimate from the census household income brackets: the bracket holding the middle household, interpolated within that bracket.
- 3.ZIP codes linked to the county's cities in the Census ZIP Code Tabulation Area relationship files.
ZIP codes we serve in St. Charles County
63304, 63368, 63376, 63366, 63367, 63385, 63301, 63303, 63348
Cities we serve in St. Charles County
We work with businesses in every community of 5,000 or more people in St. Charles County, MO, and the smaller communities around them.
- O'Fallon
- St. Charles
- St. Peters
- Wentzville
- Lake St. Louis
- Dardenne Prairie
- Cottleville
- Weldon Spring
Questions from St. Charles County, MO
What is the local market like for business websites in St. Charles County?
St. Charles County has 414,535 residents and 8,903 business establishments across all sectors. Median household income is higher than most counties we serve, and homeownership is about 81%. That mix suits home service trades, healthcare and professional firms that want to be found online.
Which St. Charles County cities can my business reach with its website?
O'Fallon, St. Charles, St. Peters, Wentzville, Lake St. Louis, Dardenne Prairie, Cottleville and Weldon Spring all have more than 5,000 residents. If you serve them, each can have its own page. We would build pages around where you really work.
Have you built sites for St. Charles County businesses before?
Yes. We built Stucky's Garage Doors in Wentzville, B. Woody's Tree Service in St. Charles and Archer Spaces, which serves St. Charles and St. Louis County. You can see them in our showroom.
How do I get started with Untap Web in St. Charles County?
Build a bid on our site to pick a plan and see current prices. Launch is 3 to 6 weeks once we have everything we need from you (your content, logins and photos). We also cover local search and AI search so people can find you across the St. Louis metro.
Other counties in the St. Louis metro
| County | Population |
|---|---|
| St. Louis County, MO | 995,569 |
| St. Louis city, MO | 288,512 |
| Madison County, IL | 264,238 |
| St. Clair County, IL | 253,694 |
| Jefferson County, MO | 229,458 |
Get a bid for your St. Charles County business
Pick a plan and the features you need in the bid builder. We built Stucky's Garage Doors in Wentzville, MO. Stand Up and Growth have fixed prices, so your bid is instant. Custom work is reviewed by Chris, who gets in touch to talk it through.
Build your bid