U.S. land data coverage by state

Alabama parcel assessment, recorded land instruments, planning, roads, and many permit questions remain county based. State revenue, environmental, water, and GIS resources add useful context, but local records and field conditions control the transaction questions.

Alaska has no single county-style parcel system. Organized boroughs and municipalities maintain many assessment records, while state land status, federal land, Native corporation interests, remote access, water, permafrost, coastal exposure, and incomplete local services can require separate research.

Arizona county assessors maintain parcel assessment records, while county recorders, planning departments, the state, tribes, and federal land managers answer different questions. Water supply, legal access, flood hazards, heat, wildfire, geology, septic, and public-land boundaries often matter to vacant-land feasibility.

Arkansas assessment and deed records are local, while the Arkansas GIS Office and state environmental and natural-resource agencies provide broader context. Karst, floodplains, timber, mineral interests, private roads, septic, wells, and rural utility service can require focused follow-up.

California combines county assessment and recorder systems with extensive state mapping. Water, wildfire, geologic hazards, coastal rules, protected resources, agricultural programs, septic, insurance, local planning, and development fees can make a parcel-specific review substantially more complex than a statewide map suggests.

Colorado provides a statewide public parcel aggregation while county assessors remain the stewards of local assessment records. Water rights, wells, mountain access, wildfire, steep terrain, geologic hazards, mining, septic, special districts, and conservation restrictions often require separate review.

Connecticut assessment and land-use authority is strongly municipal. The state GIS Office publishes standardized parcel and computer-assisted mass-appraisal data assembled through regional councils, while town clerks, assessors, wetlands agencies, health districts, utilities, and planning offices retain controlling records.

Delaware has only three counties, but assessment, recorder, planning, sewer, and land-use responsibilities still differ by county and municipality. FirstMap and state environmental resources provide useful statewide context for parcels, wetlands, flooding, coastal conditions, groundwater, and infrastructure.

Florida combines county property-appraiser records with unusually useful statewide property-tax data and extensive state environmental mapping. Coastal exposure, wetlands, drainage, septic, protected resources, and insurance-related questions can make the difference between a promising map and a workable land plan.

Georgia's 159 counties maintain parcel assessment and many local land records, with state oversight and environmental resources providing broader context. Septic, wells, private roads, timber, wetlands, floodplain, coastal conditions, mining, and fast-changing local development rules can all deserve follow-up.

Hawaii's county tax systems and statewide GIS support parcel research across islands, but shoreline, lava, tsunami, flooding, steep terrain, water, cesspools, wastewater, agricultural districts, conservation lands, Native Hawaiian interests, and island-specific infrastructure require careful local follow-up.

Idaho county assessors maintain assessment records, while state geospatial, water, environmental, and public-land resources support broader screening. Water rights, wells, irrigation, wildfire, steep terrain, mining, septic, private roads, and federal-land adjacency commonly require separate verification.

Illinois real-property assessment is administered locally under state law, and parcel GIS availability differs by county. Agricultural drainage, floodplain, wetlands, soil productivity, private utilities, mine history, environmental records, municipal zoning, and unincorporated development processes can require separate research.

IndianaMap harvests data from state and local partners across all 92 counties, offering useful statewide discovery while county offices retain parcel, recorder, planning, drainage, health, and permit records. Agricultural drainage, floodplains, mines, septic, wells, and utility territories can be material.

Iowa county and city assessors maintain property records while state geospatial and natural-resource systems provide agricultural, water, flood, environmental, and infrastructure context. Drainage districts, tile systems, soil productivity, access, rural utilities, septic, wells, and agricultural agreements often require local documents.

Kansas property valuation is administered by county appraisers under statewide standards. ORKA offers a valuable parcel-level research path for participating data, while county offices remain responsible for the current assessment record. Rural access, agricultural use, drainage, water, septic, improvements, and legal descriptions still require direct verification.

Kentucky property valuation administrators maintain local assessment and tax-map records with state mapping support. Karst, caves, sinkholes, steep terrain, mines, floodplain, septic, wells, private roads, mineral estates, and rural utility service can be central to land research.

Louisiana parish assessors and clerks maintain local parcel, assessment, conveyance, and mortgage records, while state GIS and environmental agencies add flood, coastal, wetland, water, geology, infrastructure, and regulated-record context. Subsidence, drainage, levees, septic, and coastal change require careful labels.

Maine property assessment is generally municipal, with the state handling parts of the unorganized territory and publishing supporting resources. Shoreland zoning, private roads, seasonal access, wells, septic, wetlands, timber, conserved lands, subdivision history, and remote utilities often require local records.

Maryland's state assessment system provides a more centralized property-record path than many states, while counties and municipalities control much of planning, zoning, permits, roads, utilities, and environmental health. Chesapeake, coastal, wetland, septic, well, agricultural-preservation, and stormwater issues can be material.

Massachusetts publishes a strong standardized statewide parcel layer assembled from municipal assessors, while land records, zoning, conservation commissions, boards of health, utilities, and permitting remain local or regional. Wetlands, septic, drinking-water protection, historic resources, and frontage can strongly affect land use.

Michigan property assessment is administered through local units, while county and state systems support deed, parcel, environmental, water, wetland, and natural-resource research. Great Lakes shorelines, inland lakes, wetlands, septic, wells, private roads, mines, contamination, and forestry can all require focused follow-up.

Minnesota counties maintain property records and many publish parcel data through state discovery resources. Wetlands, shoreland, floodplain, drainage, septic, wells, feedlots, mines, forestry, tribal or public lands, and winter access require separate state and local research.

Mississippi county tax assessors and chancery clerks maintain local parcel, assessment, and land records, while MARIS and state agencies provide elevation, flood, environmental, soils, water, and infrastructure context. Rural access, septic, wells, timber, wetlands, drainage, coastal hazards, and mineral interests may need separate review.

Missouri county assessors and recorders maintain local parcel and land records, supported by statewide geospatial, natural-resource, environmental, and water resources. Karst, caves, mines, floodplains, private roads, septic, wells, timber, agricultural leases, and rural utilities can materially affect land use.

Montana provides centralized state property assessment and a statewide cadastral map while county clerks and recorders, local planning offices, and state or federal agencies retain controlling records. Water rights, access, wildfire, wells, septic, grazing, public lands, minerals, and conservation restrictions deserve separate review.

Nebraska directs parcel-specific assessment research to county assessors and their parcel-search systems. State GIS, environmental, and natural-resource agencies add context for soils, floodplain, groundwater, irrigation, drainage, feedlots, conservation, and infrastructure, but local and district records remain essential.

Nevada county assessors maintain locally assessed property records while extensive federal land, water rights, wells, mining, desert access, flood hazards, wildfire, septic, and remote utilities require separate state, federal, county, and field research.

New Hampshire property assessment and most land-use administration are municipal, supported by statewide GRANIT and environmental resources. Current-use taxation, shoreland, wetlands, septic, wells, private roads, steep terrain, forestry, conservation, and seasonal access require local and recorded evidence.

New Jersey parcel assessment is municipal, deeds are county recorded, and NJGIN aggregates statewide geographic resources. Wetlands, flood hazards, Highlands, Pinelands, coastal zones, contaminated sites, septic, public utilities, affordable-housing obligations, and dense local zoning can all affect a land plan.

New Mexico county assessors maintain local parcel assessment records, while water, state land, federal land, tribal lands, acequias, mining, desert access, flood hazards, septic, wells, and remote utilities often require separate legal and physical verification.

New York's statewide parcel program aggregates county tax-parcel data where local agreements permit public access, while assessors, county clerks, municipalities, health departments, and state agencies retain controlling records. Wetlands, Adirondack or Catskill rules, septic, wells, shoreland, floodplain, utilities, and local zoning vary widely.

North Carolina offers statewide parcel discovery through NC OneMap, which aggregates standardized data from all 100 counties and the Eastern Band of Cherokee Indians while retaining county-supplied geometry. County assessors, registers of deeds, planning departments, and environmental-health offices still provide the current local records and decisions.

North Dakota counties administer property assessment, while the state GIS Hub supports a parcel program and broad resource mapping. Agricultural drainage, water, oil and gas, minerals, pipelines, wetlands, floodplain, access, rural utilities, and tribal or federal interests can require separate records.

Ohio county auditors maintain parcel assessment and GIS records, with county recorders, planning authorities, health districts, drainage offices, utilities, and state agencies holding other controlling information. Mines, karst, septic, wells, floodplain, drainage, wetlands, brownfields, and agricultural programs may warrant focused review.

Oklahoma county assessors maintain parcel assessment records, while state water, environmental, energy, transportation, and GIS systems add broader context. Tribal jurisdiction, minerals, oil and gas, wells, pipelines, floodplain, tornado and wildfire exposure, septic, water, and rural access can require distinct research.

Oregon property records are primarily local, while the state publishes broad geospatial, environmental, water, wildfire, forestry, coastal, and land-use information. Exclusive farm or forest use, water rights, wells, septic, wildfire, steep terrain, wetlands, coastal hazards, and public-land access often require deeper review.

Pennsylvania county assessment and recorder systems provide local parcel and land records, while PASDA and state agencies publish extensive environmental, geology, mining, water, hazard, and infrastructure data. Municipal zoning, septic, private wells, mines, oil and gas, floodplain, and private roads can all require separate review.

Rhode Island property assessment and most land-use administration are municipal, while RIGIS and state environmental programs provide statewide parcel, coastal, wetland, flood, water, and infrastructure context. Small distances do not eliminate local zoning, septic, water, shoreline, historic, or utility constraints.

South Carolina county assessors maintain parcel assessment records while state geographic, environmental, water, coastal, and natural-resource programs add broader screening context. Wetlands, floodplain, coastal zones, septic, wells, timber, mines, access, and rapid local development require direct county and agency follow-up.

South Dakota county directors of equalization maintain assessment records, while state GIS, water, environmental, agriculture, and natural-resource systems provide broader context. Water rights, wells, minerals, pipelines, tribal and federal lands, prairie wetlands, floodplain, access, and rural utilities require separate verification.

Tennessee county assessors maintain parcel assessment records under state oversight, while county registers, planning offices, health authorities, utilities, and state environmental programs hold other controlling evidence. Steep terrain, karst, mines, floodplain, septic, wells, private roads, timber, and fast-changing growth areas deserve separate review.

Texas land research is strongly local. County appraisal districts maintain appraisal records, county clerks maintain recorded instruments, and cities or counties control many planning and development questions. State agencies add important water, environmental, mineral, and infrastructure context, but they do not replace those local records.

Utah provides a strong statewide parcel-discovery path through the Utah Geospatial Resource Center, while county recorders, assessors, and local land-use authorities retain the controlling records. Water rights, public-land adjacency, steep terrain, wildfire, geologic conditions, and private access often deserve separate attention.

Vermont municipal listers and clerks maintain assessment and land records, while state geospatial and environmental systems add parcel, water, wetland, natural-resource, transportation, and hazard context. Act 250, current use, septic, wells, private roads, steep terrain, flood erosion, and conservation can require distinct review.

Virginia's counties and independent cities maintain assessment, land-record, zoning, planning, utility, and permit systems, supported by statewide GIS and environmental resources. Septic, wells, Chesapeake Bay rules, floodplain, wetlands, private roads, karst, mines, steep terrain, and conservation interests can require local review.

Washington county assessors and auditors maintain local property and recorded land information, while state systems provide environmental, water, shoreline, forest, hazard, and infrastructure data. Water rights, wells, septic, critical areas, wildfire, landslides, shorelines, forestry, tribal interests, and rural access deserve separate review.

West Virginia county assessors and clerks maintain local parcel, assessment, and deed records, while statewide GIS and environmental programs add terrain, mine, oil and gas, flood, water, infrastructure, and natural-resource context. Steep access, mineral severance, mines, wells, septic, and private roads can be decisive.

Wisconsin's Statewide Parcel Map Initiative aggregates local land information while municipalities and counties retain assessment, deed, zoning, health, road, and permit records. Shoreland, wetlands, septic, wells, agricultural drainage, mines, forestry, groundwater, and private roads can require separate verification.

Wyoming county assessors maintain local parcel assessment records, while GeoWYO and state agencies provide land status, water, geology, energy, environmental, wildlife, and infrastructure context. Water rights, wells, mineral estates, grazing, public lands, wildfire, winter access, septic, and remote utilities commonly require deeper research.