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
855+ 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
181
Sold in O'Fallon, MO
Top Agent(143)
Kathy Helbig
eXp Realty, LLC | Experience Real Estate Partners
29 Years of experience
68+ 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 0.87%
in O'Fallon, MO
$20.3M
All-Time Sales
$40K - $1.6M
Price Range
Top AgentTop 0.95%
in O'Fallon, MO
$8.6M
All-Time Sales
72
Sold in O'Fallon, MO
Top AgentTop 1.39%
in O'Fallon, MO
$181.6M
All-Time Sales
$140K - $2.3M
Price Range
5%
Negotiated Off List
Top Agent(182)
Brittany Peterson
Worth Clark Realty | Maerock Real Estate
7 Years of experience
161+ Sales in the last 12 months
Top 1.65%
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
19+ Sales in the last 12 months
Top 1.82%
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
111+ Sales in the last 12 months
Top 1.99%
in O'Fallon, MO
$49.6M
All-Time Sales
$20K - $580K
Price Range
4%
Negotiated Off List
Top AgentTop 2.25%
in O'Fallon, MO
$11.6M
All-Time Sales
$40K - $1.2M
Price Range
Top AgentTop 3.21%
in O'Fallon, MO
$440K
All-Time Sales
12
Sold in O'Fallon, MO
Top AgentTop 3.47%
in O'Fallon, MO
$14.3M
All-Time Sales
$50K - $410K
Price Range
7%
Negotiated Off List
Top AgentTop 3.9%
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 4.07%
in O'Fallon, MO
$350K
All-Time Sales
6
Sold in O'Fallon, MO
Top AgentTop 4.07%
in O'Fallon, MO
$1.2M
All-Time Sales
6
Sold in O'Fallon, MO
Top AgentTop 4.42%
in O'Fallon, MO
$107.9M
All-Time Sales
$140K - $750K
Price Range
Top AgentTop 4.68%
in O'Fallon, MO
$235.9M
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
$24.3M
All-Time Sales
$120K - $600K
Price Range
157
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.
What These Numbers Mean for O'Fallon Buyers and Sellers
The Housing Market Trends module above puts O'Fallon in measurable seller-favorable territory, and the competitive indicators explain why. With only 1.2 months of supply against 110 homes sold monthly and 128 active listings, buyers are competing for a thin pool of homes. That scarcity shows in the data: 74.4% of listings leave the market within two weeks, and the average sale-to-list ratio sits at 101.28%, meaning well-positioned homes routinely clear at or above asking. The median home moves in just 8 days, though that reflects a -3 days change in market time year over year, a signal that pace has moderated from its tightest point.
Leverage is not evenly distributed, however. Roughly 30.5% of listings have taken a price cut, and the share selling above list (48.2%) has softened year over year. For a buyer, this means aggressive over-asking bids are less automatic than headline speed suggests: homes that linger past two weeks or that have already cut price are where negotiation room opens. For a seller, the message is precision. Pricing to the $183.061 per square foot the market currently supports draws the fast, at-or-above-list outcome, while overpricing invites the price-drop cycle that 30.5% of listings are experiencing.
With a median sale price of $374,950 and 138 new listings arriving monthly, timing and pricing discipline matter. Across 1,154 licensed agents in the area, the difference between a strong outcome and an average one often comes down to who reads these signals correctly.
What O'Fallon Home Prices Mean for You
Understanding the true cost of homeownership in O'Fallon goes beyond the listing price. These calculators break down what today's market conditions mean for your budget, your timeline, and your negotiating position.
| Median home price | $374,950 |
| Down payment (20%) | $74,990 |
| Loan amount | $299,960 |
| Monthly payment (PITI) | $2,546 |
Based on 28% debt-to-income ratio, 6.58% mortgage rate (as of July 23, 2026), 30-year fixed loan, 1.15% property tax rate, $275/mo insurance. Actual requirements vary by lender.
Based on $374,950 median home price with 20% down at 6.58% (as of July 23, 2026) for 30 years. Property tax estimated at 1.15% of home value.
Year-over-year data reflects the most recent rolling period from O'Fallon MLS records. Prior year values calculated from current figures and published YoY changes.
What to Look for in a O'Fallon Realtor
Choosing an agent on name recognition alone overlooks what actually drives results: measured transaction history and negotiation outcomes. EffectiveAgents analyzed 1,114 transactions to rank the top performers in O'Fallon. The top-ranked agent, Mark Gellman at eXp Realty (The Gellman Team), has recorded 7,225 career transactions, 490 client reviews, and $383.7M in all-time sales volume. In a market where the sale-to-list ratio holds at 101.28% and 74.4% of homes sell within two weeks, negotiation skill is the variable that separates list-price outcomes from above-list ones. An agent who understands when 30.5% of active listings signal buyer leverage, and when the 8 day median demands a first-day offer, protects your position on either side of the deal. Of the 1,154 licensed agents in the area, only 53 meet the EffectiveAgents ranking threshold. When reviewing candidates, look for consistent review patterns over time rather than a handful of recent five-star entries, since sustained volume tends to reflect repeatable process rather than a single strong stretch.
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
Who is the best real estate agent in O'Fallon, MO?
The top-ranked agent in O'Fallon, MO, is Mark Gellman at eXp Realty (The Gellman Team), with 7,225 career transactions, 490 reviews, and $383.7M in all-time sales volume. EffectiveAgents identifies leading agents by analyzing verified transaction records, closing outcomes, and client review history rather than advertising spend. Across 1,114 transactions studied, only 53 of the area's 1,154 licensed agents qualify for a ranking. The right match depends on your price range, timeline, and property type, so compare several ranked candidates before deciding.
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.
How long does it take to sell a house in O'Fallon?
In O'Fallon, the median home sells in about 8 days, though that reflects a -3 days change in market time compared with last year. With 74.4% of listings leaving the market within two weeks, well-priced homes move quickly, but timeline varies with pricing accuracy, condition, and location. Homes priced above what the $183.061 per square foot market supports tend to sit longer and join the 30.5% of listings that cut price. Accurate initial pricing and presentation are the biggest levers on how fast your sale closes.
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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