Marathon Key, Jacksonville Beach, FL Property Records

Duval County property records for 8 addresses on Marathon Key, Jacksonville Beach, FL · Last verified June 2026

Marathon Key Highlights

Properties 8
Median Sale Price $265,000
Deeds and Mortgages on File 7
Median Price per Sqft $90
Owner Occupied 100%
Median Annual Tax Bill $16,258
Median Year Built 2016
Median Ownership Tenure 11 years

Properties on Marathon Key

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

3613 Marathon Key

4 bd · 5 ba · 3,862 sqft · built 2015 · 0.219 acres

Last Sale Tax Bill Prior Sale Owner Records
$235,000Nov 2013 $18,7422025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

3660 Marathon Key

4 bd · 3.5 ba · 2,202 sqft · built 2013 · 0.18 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,500,000Aug 2025 $15,4802025 Amount on Record Sep 2023 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

3701 Marathon Key

4 bd · 4.5 ba · 3,821 sqft · built 2015 · 0.288 acres

Last Sale Tax Bill Prior Sale Owner Records
$300,000Feb 2014 $11,5202025 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

3702 Marathon Key

1 bd · 1 ba · 1,540 sqft · built 2016 · 0.198 acres

Last Sale Tax Bill Prior Sale Owner Records
$250,000Apr 2015 $14,7532025 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

3705 Marathon Key

4 bd · 3.5 ba · 3,137 sqft · built 2016 · 0.173 acres

Last Sale Tax Bill Prior Sale Owner Records
$265,000Jun 2015 $16,2582025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

3706 Marathon Key

4 bd · 4.5 ba · 2,588 sqft · built 2013 · 0.184 acres

Last Sale Tax Bill Prior Sale Owner Records
$900,000Oct 2013 $16,9082025 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

3709 Marathon Key

3 bd · 3 ba · 2,925 sqft · built 2016 · 0.167 acres

Last Sale Tax Bill Prior Sale Owner Records
$265,000Mar 2016 $13,0332025 Amount on Record Mar 2016 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

3713 Marathon Key

4 bd · 4.5 ba · 3,255 sqft · built 2023 · 0.201 acres

Last Sale Tax Bill Prior Sale Owner Records
$265,000Aug 2017 $31,1172025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

Wildfire Risk on Marathon Key

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

Property Records in Nearby Streets