United States Missouri O Fallon
Missouri · O Fallon · 2026
Top real estate brokerages in O Fallon, MO
Count taken September 12, 2026Page built October 17, 2026
191 real estate agents in O Fallon, Missouri had a published brokerage profile on September 12, 2026. Berkshire Hathaway HomeServices is the largest real estate brokerage in O Fallon with 185 agents, 96.9% of the 191 whose profile names a brokerage; the three largest together hold 100%.
Real estate brokerages in O Fallon, ranked by agents
Every brokerage with 3 or more agents in O Fallon. A company that publishes no office names appears as one row covering all its offices in the city.
| Brokerage | Agents | Share of attributed agents | Brand | |
|---|---|---|---|---|
| 1 | Berkshire Hathaway HomeServices | 185 | 96.9% | |
| 2 | RE/MAX | 4 | 2.1% |
Plus 1 more brokerage with 2 agents between them.
How O Fallon compares with Missouri
O Fallon holds 2.9% of the agents counted in Missouri and ranks 6th of the 169 Missouri cities with at least one agent. The largest brokerage's share is 96.9% here against 29% for Keller Williams across Missouri as a whole, so the O Fallon market is more concentrated than the state. 0.5% of the 191 checked agents in O Fallon have a website of their own, against 6.6% statewide. 64.4% publish a direct phone number (statewide 90.7%).
How many real estate agents are in Missouri?
Other Missouri cities
- St. Louis 1,177
- Kansas City 606
- Chesterfield 532
- Springfield 487
- Columbia 240
- Lee's Summit 172
- Saint Peters 137
- Branson 136
- Maryland Heights 134
- Lees Summit 128
- Dardenne Prairie 117
- Lake Saint Louis 112
- Osage Beach 108
- Cape Girardeau 104
- Festus 102
Where the data comes from
Counted from the public agent directories of 3 brokerage brands with agents in O Fallon. Independent brokerages outside those networks are not counted, so this is a ranking among the networks we can see, not a census of every licensee in the city. Full method on the national page.
Every agent in this count has a published email address on file; the O Fallon rows are part of US Realtor List's Missouri list, and this page publishes only the totals.
Questions this page answers
- What is the largest real estate brokerage in O Fallon, MO?
- Berkshire Hathaway HomeServices with 185 agents, 96.9% of O Fallon agents whose profile names a brokerage, ahead of RE/MAX (4).
- How many real estate agents are in O Fallon, MO?
- 191 as of September 12, 2026, counting agents with a published brokerage profile. That is 2.9% of the 6,575 counted in Missouri.
Cite this page
Realty Census (2026). Top real estate brokerages in O Fallon, MO: 191 agents. Count dated 2026-09-12. https://realtycensus.com/missouri/o-fallon/