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County · code 12085

Martin CountyFlorida

Martin County is a county in Florida established in 1925 with its seat in Stuart. It was named after John W. Martin.

  • Founded1925
  • County seatStuart
  • Named forJohn W. Martin
  • Land area544 sq mi + 209 sq mi water
  • Population158,431 2020 Census
Open the free map Click any parcel in Martin County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

St. LuciePalm BeachOkeechobeeGlades Stuart Census outline · seat marked

Where it is

Martin on the map of Florida

Florida has 67 counties and county equivalents, each with its own records office. Shapes with a page are links.

Alachua CountyBaker CountyBay CountyBradford CountyBrevard CountyBroward CountyCalhoun CountyCharlotte CountyCitrus CountyClay CountyCollier CountyColumbia CountyDeSoto CountyDixie CountyDuval CountyEscambia CountyFlagler CountyFranklin CountyGadsden CountyGilchrist CountyGlades CountyGulf CountyHamilton CountyHardee CountyHendry CountyHernando CountyHighlands CountyHillsborough CountyHolmes CountyIndian River CountyJackson CountyJefferson CountyLafayette CountyLake CountyLee CountyLeon CountyLevy CountyLiberty CountyMadison CountyManatee CountyMarion CountyMiami-Dade CountyMonroe CountyNassau CountyOkaloosa CountyOkeechobee CountyOrange CountyOsceola CountyPalm Beach CountyPasco CountyPinellas CountyPolk CountyPutnam CountySt. Johns CountySt. Lucie CountySanta Rosa CountySarasota CountySeminole CountySumter CountySuwannee CountyTaylor CountyUnion CountyVolusia CountyWakulla CountyWalton CountyWashington CountyMartin County Martin
Counties of Florida · Martin highlighted

History

Formed in 1925 from Palm Beach County and St. Lucie County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Martin County was created on August 4, 1925, from Palm Beach County and St. Lucie County. In 1963, Martin County gained part of Lake Okeechobee from Palm Beach County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1925
    Martin County created Martin created from Palm Beach and St. Lucie.
    from Palm Beachfrom St. Lucie
    · Fla. Laws 1925, 20th sess., gen., ch. 10180, secs. 1, 25-26/pp. 359, 368; Hutchinson, front endpapers
  2. 1963
    Gained territory Martin gained part of Lake Okeechobee from Palm Beach.
    from Palm Beach
    · Fla. Laws 1963, 39th sess., gen., ch. 63-200, secs. 1-5/pp. 451-454

Land and parcels

What the maps cover in Martin

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Martin by the Census

Population
158,431 2020 Census count
Housing units
81,371 2020 Census count
Land area
544 square miles
Water area
209 square miles
People per sq mi
291 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Martin County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Martin County

When was Martin County founded?
Martin County was founded in 1925, formed from Palm Beach County and St. Lucie County, and named after John W. Martin.
What is the county seat of Martin County?
The county seat of Martin County is Stuart.
Is there an online parcel map for Martin County?
Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
Has Martin County's boundary or name changed?
Martin County was created in 1925 from Palm Beach County and St. Lucie County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Palm Beach County.
Is my lot in a flood zone?
We do not have flood maps for Martin County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door