Top Realtors and Real Estate Agents in O'Fallon, MO
Rankings based on verified MLS transaction data. Last updated May 2026. No pay-to-play.
Top Agent
(490)
Mark Gellman
eXp Realty - The Gellman Team
27 Years of experience
810+ Sales in the last 12 months
Top 0.09%
in O'Fallon, MO
$383.7M
All-Time Sales
$40K - $2.9M
Price Range
7%
Negotiated Off List
Top AgentTop 0.26%
in O'Fallon, MO
$14.8M
All-Time Sales
180
Sold in O'Fallon, MO
Top Agent(143)
Kathy Helbig
eXp Realty, LLC | Experience Real Estate Partners
29 Years of experience
65+ Sales in the last 12 months
Top 0.61%
in O'Fallon, MO
$2M
All-Time Sales
112
Sold in O'Fallon, MO
Top AgentTop 0.78%
in O'Fallon, MO
$8.6M
All-Time Sales
72
Sold in O'Fallon, MO
Top AgentTop 0.87%
in O'Fallon, MO
$20.3M
All-Time Sales
$40K - $1.6M
Price Range
Top AgentTop 1.3%
in O'Fallon, MO
$181.6M
All-Time Sales
$140K - $2.3M
Price Range
5%
Negotiated Off List
Top Agent(181)
Brittany Peterson
Worth Clark Realty | Maerock Real Estate
7 Years of experience
156+ Sales in the last 12 months
Top 1.56%
in O'Fallon, MO
$2.2M
All-Time Sales
41
Sold in O'Fallon, MO
Top Agent(20)
Jessica Vargas
Keller Williams Mid Rivers Homes - Jessica's Property Team
10 Years of experience
20+ Sales in the last 12 months
Top 1.73%
in O'Fallon, MO
$350K
All-Time Sales
33
Sold in O'Fallon, MO
Top Agent(59)
Lisa Burkemper
Berkshire Hathaway Home Services Select Properties
27 Years of experience
109+ Sales in the last 12 months
Top 1.91%
in O'Fallon, MO
$49.6M
All-Time Sales
$20K - $580K
Price Range
4%
Negotiated Off List
Top AgentTop 2.17%
in O'Fallon, MO
$11.6M
All-Time Sales
$40K - $1.2M
Price Range
Top AgentTop 3.12%
in O'Fallon, MO
$440K
All-Time Sales
12
Sold in O'Fallon, MO
Top AgentTop 3.38%
in O'Fallon, MO
$14.3M
All-Time Sales
$50K - $410K
Price Range
7%
Negotiated Off List
Top AgentTop 3.73%
in O'Fallon, MO
$1.1M
All-Time Sales
7
Sold in O'Fallon, MO
Top AgentTop 3.81%
in O'Fallon, MO
7
Sold in O'Fallon, MO
78
Total Number Of Homes Sold
Top Agent(29)
Angela Heintz (BUYERS AGENT)
Keller Williams Realty St. Louis
12 Years of experience
1+ Sales in the last 12 months
Top 3.99%
in O'Fallon, MO
$350K
All-Time Sales
6
Sold in O'Fallon, MO
Top AgentTop 3.99%
in O'Fallon, MO
$1.2M
All-Time Sales
6
Sold in O'Fallon, MO
Top AgentTop 4.33%
in O'Fallon, MO
$106.9M
All-Time Sales
$140K - $750K
Price Range
Top AgentTop 4.59%
in O'Fallon, MO
$235.7M
All-Time Sales
$140K - $930K
Price Range
6%
Negotiated Off List
Top AgentTop 5.81%
in O'Fallon, MO
$900K
All-Time Sales
3
Sold in O'Fallon, MO
Top AgentTop 6.15%
in O'Fallon, MO
$39.3M
All-Time Sales
$30K - $1M
Price Range
8%
Negotiated Off List
Top Agent$91.9M
All-Time Sales
$120K - $580K
Price Range
5%
Negotiated Off List
Top AgentReviews not yet available
Monica Mahtani
Coldwell Banker Brown Realtors
7 Years of experience
49+ Sales in the last 12 months
$24.1M
All-Time Sales
$120K - $600K
Price Range
156
Total Number Of Homes Sold
Top Agent2015
Year Licensed
11
Years Experience
O'fallon Housing Market Trends
Median Sale Price
$374,950
-0.01% year-over-yearMedian Days on Market
8
-3 days year-over-yearSale-to-List Price
101.28%
+0.22% year-over-yearHomes Sold Above List Price
48.2%
-4.2% year-over-yearOff the Market in 2 Weeks
74.4%
+10.0% year-over-yearListings With Price Drops
30.5%
-7.6% year-over-yearMonths of Supply
1.2
Realtors in O'fallon
1,154
Verified MLS market data through May 2026.
When Is the Best Time to Sell a House in O'Fallon?
Based on the last 24 months of verified MLS market data, homes in O'Fallon sell fastest and closest to asking when they go under contract in June. To hit that window, plan to list around June.
Median days on market by month (shorter is faster)
June
Best month to sell
6 days
Typical time on market
102%
Of asking price
Seasonal averages from the last 24 months of O'Fallon, MO sales. Individual results vary with price, condition, and how the broader market moves. A local agent can pinpoint the right timing for your home.
How We Rank O'Fallon Real Estate Agents
Our rankings are built from verified MLS transaction data, not advertising spend. For every agent we analyze more than fifteen performance signals, including sales volume in your city and zip code, recent and all-time transactions, days on market, negotiation results (how far above or below list price an agent's clients actually close), price-point fit, and verified reviews. The agents shown first are those whose verified results put them at the top of the O'Fallon market today.
Agents cannot pay for placement in these rankings. The underlying data refreshes as new closed transactions are reported, so rankings shift with real market performance. Learn how we rank agents.
Rankings reviewed by Kevin Stuteville, Licensed Florida Real Estate Broker (License BK3068131), Founder of EffectiveAgents.
Data last updated: May 2026
O'Fallon Real Estate Agent FAQs
How were these O'Fallon real estate agents ranked?
Rankings are built from verified MLS transaction data. We analyze more than fifteen performance signals for every agent, including sales volume in your city and zip code, recent and all-time transactions, days on market, negotiation results, price-point fit, and verified reviews. Agents cannot pay for placement.
How many real estate agents are in O'Fallon?
Our data covers 1,154 real estate agents serving the O'Fallon area. The count represents agents with transaction activity recorded in our O'Fallon market data, not simply everyone holding a license.
What does the median sale price in O'Fallon mean for sellers?
O'Fallon's median sale price is $374,950 as of May 2026. Half of recent sales closed above that figure and half below. It is a useful baseline for understanding the market, but an experienced local agent will price your home against comparable recent sales in your neighborhood, not the citywide median.
Does it cost anything to use EffectiveAgents?
No. EffectiveAgents is free for home buyers and sellers, with no obligation to work with any agent we match you with.
Do agents pay to be ranked or featured?
No. Agents cannot pay for placement anywhere in these rankings. Positions are earned from verified transaction performance only.
What commission do O'Fallon realtors charge?
Commissions are negotiable and vary by agent, service level, and transaction. There is no set rate, and recent industry changes have made commission structures more flexible than ever. Discuss the structure directly with your agent before signing a listing or buyer agreement.
Should I use a local O'Fallon agent or a national brand?
The individual agent matters more than the brand on the sign. Offices within the same national franchise vary widely in performance, and the agent you hire, not the logo, prices your home, negotiates your contract, and manages your closing. A strong local agent brings firsthand knowledge of O'Fallon neighborhoods, pricing patterns, and buyer activity. Compare agents on verified local results such as recent sales, days on market, and negotiation outcomes rather than name recognition.
What questions should I ask a O'Fallon realtor before hiring them?
Ask how many homes they have closed in O'Fallon in the past year, what their average sale-to-list ratio is, and how much of their business is in your neighborhood and price range. Ask how they will market your home or find you listings, and how often they will communicate. Strong agents answer with specifics. Verified transaction data is the fastest way to confirm what you hear.
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