Iron Mountain Lake is a city in St. Francois County, Missouri, home to about 781 people across 2.0 square miles. It has no ZIP code of its own: it’s part of 63624 and 63650.
Homes sold for a median of $96 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
Mostly Bismarck; part is in Iron Mountain Lake
Mostly Ironton; part is in Iron Mountain Lake
Each card is that ZIP code’s whole market, including any part outside Iron Mountain Lake. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Iron Mountain Lake’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)71 miles away |
|---|---|
| Nearest city of 250,000+ | St. Louis, MO65 miles away |
| Nearest city of 1 million+ | Chicago, IL322 miles away |
Straight-line distances from the center of Iron Mountain Lake; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Iron Mountain Lake had 640 residents in the 2020 census, down 8% since 2000.
It’s the 424th largest of 1,060 towns in Missouri by population.
St. Francois County grew from 24,051 residents in 1900 to 66,922 in 2020.
St. Francois County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 89°F in summer, and winter lows average 23°F. About 45.4 inches of rain and melted snow fall in a typical year, with about 9 inches of snow.
Source: NOAA 1991–2020 climate normals, Farmington, MO weather station (11 miles away).
17,990 jobs at 1,438 businesses in St. Francois County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
13 doctors and other health care providers list an office in Iron Mountain Lake’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Dentists | 1 |
| Nurse practitioners and physician assistants | 1 |
| Mental health providers | 5 |
| Physical and occupational therapists | 2 |
| Chiropractors | 1 |
| Pharmacies | 7 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Arcadia Valley R-II, Bismarck R-V. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Arcadia Valley Elem.Ironton | Pre-K–4 | 387 | Public | 10.3 mi |
| Bismarck R-V Elem.Bismarck | Pre-K–5 | 207 | Public | 2.4 mi |
| Arcadia Valley MiddleIronton | 5–8 | 281 | Public | 10.3 mi |
| Bismarck R-V HighBismarck | 6–12 | 239 | Public | 2.4 mi |
| Arcadia Valley Career Tech CtrIronton | 9–12 | — | Career and Technical | 10.4 mi |
| Arcadia Valley HighIronton | 9–12 | 306 | Public | 10.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Ironton, Bismarck, Pilot Knob and Arcadia.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.