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Buying land in Monroe County, Florida: what to check

Monroe County covers 983 square miles of land and 4,307 of water in Florida, with about 80,908 residents in 2024 (down 2.4% since 2020). The 2020 Census counted 96% of its land as rural and 87% of residents as living in urban areas. Below: how much of Monroe County floods, what its soils allow, what farmland is worth and how often it's in drought, from free public data with every source linked.

Check a location in Monroe CountySee a sample report

Monroe County at a glance

In the 100-year floodplain

under 1%

Below the state's county median (7.5%)

FEMA National Risk Index

Hydric (wetland-type) soils

83%

Above the state's county median (38%)

USDA NRCS Web Soil Survey (SSURGO)

Soils very limited for septic

100%

USDA NRCS Web Soil Survey (SSURGO)

Weeks in severe drought

17%

Share of weekly maps, 2021–2026

U.S. Drought Monitor county statistics

Land classed rural

96%

Census 2020 Census urban and rural classification

What to check before buying land in Monroe County

Ordered by what Monroe County's numbers point to. Every parcel differs, so treat this as where to look first.

  1. 1.Put flood checks first in Monroe County

    under 1% of the county's area is in the 1%-annual-chance (100-year) floodplain FEMA's National Risk Index uses for inland flooding; under 1% is exposed to coastal flooding; 96% of its mapped soils flood occasionally or frequently.

    Look up the FEMA flood zone at the pin, not the parcel's address. If any of the land is in zone A or V, price flood insurance before you offer, ask for an elevation certificate, and check whether the access road floods too.

    Guide: Flood zones before buying land

  2. 2.Expect wetlands; map them before you plan

    About 83% of Monroe County's mapped soils are hydric (formed under saturated conditions, a federal wetland indicator) and 97% are poorly or very poorly drained (USDA SSURGO).

    Open the National Wetlands Inventory mapper at the parcel. Filling or draining a wetland can need a Clean Water Act Section 404 permit, and wet ground limits septic fields and building pads.

    Guide: Wetlands on land for sale

  3. 3.Budget for a perc test and maybe an engineered septic

    USDA rates 100% of Monroe County's mapped soils "very limited" for conventional septic absorption fields and 0% "not limited".

    Without city sewer you need a septic permit from the county or state health department. Make the offer contingent on a passing soil or perc test; mound and aerobic systems can cost several times a conventional one.

    Guide: Perc tests and septic systems

  4. 4.Confirm legal road access and power

    The 2020 Census classified 96% of Monroe County's land area as rural.

    Rural tracts are often sold without recorded access or a power line nearby. Get the title company to confirm a recorded easement or public road frontage, and ask the electric co-op what a line extension costs.

    Guide: Road access and landlocked land

  5. 5.Find out where the water comes from

    At least half of Monroe County was in severe drought (D2) or worse in 17% of the 262 weekly U.S. Drought Monitor maps from 2021 to 2026.

    Ask whether the land has a public water connection, an existing well (and its log and yield), or neighbors' well depths from the state well database. For a new well, check permits and typical depth with the state agency first.

    Guide: Wells, public water and water rights

Flood zones, wetlands and water in Monroe County

Area in the 1%-annual-chance (100-year) floodplain
under 1%, the lowest of 67 in Florida FEMA National Risk Index
Area exposed to coastal flooding
under 1% FEMA National Risk Index
Mapped soils that flood occasionally or frequently
96% USDA NRCS Web Soil Survey (SSURGO)
Hydric soils (a federal wetland indicator)
83% USDA NRCS Web Soil Survey (SSURGO)
Poorly or very poorly drained soils
97% USDA NRCS Web Soil Survey (SSURGO)
Surface water (lakes, rivers, reservoirs)
4,307 sq mi Census 2024 Gazetteer Files
Drought on 2026-10-27
70% moderate or worse, 30% severe or worse U.S. Drought Monitor county statistics

The floodplain share is the area FEMA's National Risk Index counts as exposed to inland flooding, mostly mapped 100-year flood zones. It says how common flood-prone land is in Monroe County, not whether a given parcel floods. For that, look up the zone at your exact point on the FEMA Flood Map Service Center or run the free check.

Soils and terrain

Prime farmland
0% USDA NRCS Web Soil Survey (SSURGO)
Farmland of statewide importance
0% USDA NRCS Web Soil Survey (SSURGO)
Average slope over 15%
0% USDA NRCS Web Soil Survey (SSURGO)
Very limited for septic absorption fields
100% USDA NRCS Web Soil Survey (SSURGO)
Not limited for septic absorption fields
0% USDA NRCS Web Soil Survey (SSURGO)

Shares of Monroe County's soil-surveyed land (about 687,612 acres, open water excluded), using each map unit's dominant condition in USDA's SSURGO soil survey. Soils change within a few hundred feet, so the soil at your building site is what matters.

Farms and land use

Farms (2022)
39 USDA NASS, 2022 Census of Agriculture
Cropland
73 acres USDA NASS, 2022 Census of Agriculture
Irrigated land
173 acres USDA NASS, 2022 Census of Agriculture

Natural hazard ratings

FEMA's National Risk Index rates each hazard for Monroe County relative to every other U.S. county. Overall risk: Relatively Moderate.

  • Coastal floodingVery High
  • HurricaneRelatively High
  • LightningRelatively High
  • Heat waveRelatively Low
  • River and inland floodingRelatively Low
  • Strong windRelatively Low
  • EarthquakeVery Low
  • HailVery Low
  • LandslideVery Low
  • TornadoVery Low
  • WildfireVery Low

FEMA National Risk Index, December 2025

Questions about buying land in Monroe County

How much of Monroe County, FL is in a flood zone?

About under 1% of Monroe County's area is in the 1%-annual-chance (100-year) floodplain used by FEMA's National Risk Index (December 2025), the lowest of 67 counties in Florida. Another under 1% is exposed to coastal flooding. Whether a given parcel is in a flood zone depends on its exact location, so check the FEMA map at your pin.

Will a septic system work on land in Monroe County?

Often, but test first. USDA soil surveys rate 100% of Monroe County's mapped soils very limited for conventional septic absorption fields, usually because of wetness, slow permeability, shallow rock or flooding. A perc or soil test on the parcel decides what system the health department will permit.

Is there good farmland in Monroe County?

0% of Monroe County's mapped soils are prime farmland, 0% are prime only if drained, irrigated or protected from flooding, and 0% are farmland of statewide importance (USDA SSURGO). The 2022 Census of Agriculture counted 39 farms.

How often is Monroe County in drought?

Since 2021, at least half of the county was in severe drought or worse in 17% of weekly U.S. Drought Monitor maps, and in extreme drought in 6.1%. On 2026-10-27, 70% of the county was in moderate drought or worse.

Can I check a specific property in Monroe County?

Yes. Enter the address or drop a pin anywhere in Monroe County on the free check. It shows which checks return data at that exact point, and the full report costs $29: flood zone, slope, soils, wetlands, roads, power lines, wildfire and more, each with its source. It is a screen of public maps, not a survey, title search or perc test.

Check the parcel, not just the county

County numbers tell you what to look for. The free check looks at your exact point in Monroe County: flood zone, slope, soils, wetlands, roads, power and more. The full report is $29.

Check a location in Monroe County

What these numbers can't tell you

  • County shares describe Monroe County as a whole; a parcel can be entirely in or out of a flood zone, wetland or poor soil.
  • It doesn't look at the whole parcel, its boundaries, title, easements, zoning or permits.
  • It isn't a survey, appraisal, elevation certificate, soil or perc test, or Phase I environmental site assessment.
  • It can't see local distribution power lines, driveways, legal access, wells or mineral rights.
  • Maps lag behind the ground, and distances are straight-line, not driving distance.

Sources and vintages

Summarized per county by our build script on 2026-10-31. County figures cover the whole county; checks on the report are at your point.