Neighborhood · Marathon, Florida
Tranquility Bay
Waterfront living in the heart of the Middle Keys
2
Homes for sale
$878,750
Median list price
$666
Avg price / sqft
38
Median days on market
Tranquility Bay sits in Marathon, a Middle Keys town where the ocean is never more than a few minutes away and the pace slows to match the water. This is a compact, water-oriented pocket — both current listings are waterfront — with easy reach to neighboring communities like Marathon Shores and Key Colony Beach 2nd Addition, and family-friendly schools including Marathon School.
For a buyer today, this is a thin market and you'll want to move deliberately. There are just 2 active listings with a median list price of $878,750, and homes here have been taking around 38 days to sell. If nothing on the live map fits, it's worth widening the search across the broader Marathon homes for sale to keep your options open.
Tranquility Bay is a community in Marathon, Florida.
Quick facts
$872,500 – $885K price range
1,320 sqft median home
1 sold in 12 months
On the market now
Homes for sale in Tranquility Bay
$885,000
2600 Overseas Hwy # 87, Marathon FL 33050, MARATHON
3 bd · 2.5 ba · 1,320 sqft
$872,500
2600 Overseas Hwy # 85, Marathon FL 33050, MARATHON
3 bd · 2.5 ba · 1,320 sqft
Every active listing inside the Tranquility Bay boundary
Open full map search →Find your fit
Browse Tranquility Bay
By feature — on the live map
The numbers that matter
The Tranquility Bay market
1
Sold, last 12 months
$685,000
Median sold price
98%
Sale-to-list ratio
What sellers actually get vs asking
105 days
Median time to sell
Tranquility Bay vs Marathon
Median list price
Price per sqft
Days on market
Live Stellar MLS data — every listing and closed sale inside the Tranquility Bay boundary. Rolling medians smooth single-month swings in small communities.
For the school run
Schools Tranquility Bay is zoned for
Attendance boundaries overlapping this community — always verify zoning with the district.
What it really costs
Owning here
Owning the median Tranquility Bay home
≈ $5,522/mo
$878,750 median · 20% down · 30-yr fixed at 6.9% · taxes/HOA from live listing data · insurance is a Florida estimate.
Population
233
Median age
47
Median income
$42,500
Median home value
$383,300
Beyond the listings
Living in Tranquility Bay
Hobbies & Interests
Top 10% in the U.S.Wanderlust
Always thinking about their next destination, this population loves exploring new places abroad or right in their own backyard. They hold onto past trips by sharing their favorite memories and pictures year round.
Entertainment
Top 17% in the U.S.Live & Local Music
This population follows the music. From local bands to current acts at the local venue, you can find these people researching band tours and how to get backstage passes.
Culture
Sites to See
This population finds the most beautiful sites just by looking up. Sunrise, sunset or sometime in between, these people love to marvel at man-made and natural wonders.
Food & Drink
Trendy Eats
Meals are a social experience, and these foodies take it to the next level. This population can't wait to snap a pic of their plate and share it before chowing down.
Beliefs
Local Engagement
These citizens want to make their neighborhood a better, more beautiful place to live. They're attentive to the needs and affairs of the local community.
Attitudes
Volunteering & Giving
Expressing a desire to give back and do good for the community, this behavior emphasizes charity. Common activities include volunteering, fundraisers, and donations.
Straight answers
Tranquility Bay FAQs
Is Tranquility Bay a good place to live?+
It's a water-focused neighborhood in Marathon, right in the Middle Keys, where both current listings are waterfront. Families have access to Marathon School and Stanley Switlik Elementary, and you're a short hop from established communities like Marameade and Little Venice No 2.
Is Tranquility Bay expensive?+
It sits in the upper-Keys price tier, with a median list price of $878,750 and homes running about $666 per square foot. The one sale in the past year closed at $685,000, so there's meaningful range depending on the property and its water access.
What do homes cost in Tranquility Bay?+
Current listings span $872,500 to $885,000, with a median of $878,750 for homes around 1,320 square feet. You can see what's live right now on the live map.
How is the market here?+
It's a small, tight market — just 2 active listings and 1 sale over the past 12 months. Homes have been moving in about 38 days, and sellers are averaging 98% of asking, so serious buyers should be ready to act.
What about HOA and taxes?+
HOA data isn't available for this pocket, so budget with the specific listing in mind. The median property tax runs about $8,189 per year, which is worth factoring into your monthly cost alongside the purchase price.
Keep exploring
More Marathon neighborhoods
Neighborhood boundary by edgeAI; listings matched to the polygon. IDX information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data is deemed reliable but is not guaranteed accurate by Stellar MLS.
Never miss a listing
New Tranquility Bay homes, in your inbox
A daily digest of new Marathon listings — straight from the MLS. Unsubscribe anytime.