Blog · October 14, 2026 · Missouri
Using the Florissant GIS Map
Parcel data for Florissant comes from the county, and the viewer is free.
Main page: St. Louis County, MO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
For any lot around Calverton Park, the Florissant GIS map lays out parcel boundaries plus basic tax data. This Florissant guide covers: which viewer to open, the fastest ways to search, and what to double-check with records.
Opening the Florissant GIS map: start here
Parcel maps here are usually run by the county, not the town, and for Florissant that means the St. Louis County ArcGIS parcel map.
The viewer St. Louis County publishes
The official parcel map for this area is the St. Louis County ArcGIS parcel map, and anyone can open it without signing up. If you only know roughly where the land is, pan along Interstate 64 until the lines appear, then click inside the one you want. For a parcel near Berkeley, write down the parcel ID while you have it open; each office in the county asks for it first.
When the map won't load
If the viewer stalls on a phone near Black Jack, try a desktop browser or clear the cache; the Platbookmapper county page tracks the current link.
Where Florissant fits in
Florissant sits in St. Louis County, Missouri, and the county assessor maps its lots. Closer to Calverton Park, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Lots just outside the city limits near Hazelwood usually falls under county rules rather than the town's.
Recorded documents worth pulling
The map is an index, not the title: deeds, subdivision plats and easements for land near Dellwood are filed with the Recorder of Deeds. For a tract near Dellwood, use the document number from the tax record to skip a name search.
Three ways to find a parcel
Vacant ground near Black Jack may lack an address, which means panning to it and clicking. Closer to Black Jack, searching by parcel number never misses, and you'll find it on tax statements.
Reading the legal description
Missouri follows the Public Land Survey System, which means a tract near Hazelwood is described by section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though sections near Calverton Park can be irregular. Write down the legal description for the tract near Hazelwood before you request a deed or survey.
A word on accuracy
The acreage figure is a tax-roll number; just a licensed surveyor can set the real lines on land around Hazelwood. Around Dellwood, owner names and values update on a schedule, so a deed recorded last month might lag behind.
What the layers show
With a lot near Berkeley, look in the layer list for city limits, flood hazard, zoning or soils; availability varies.
Saving what you find
Save a screenshot of the lot near Ferguson and its record panel, which helps later when you ask the assessor or a title company.
Places you'll see on the map
Clayton serves as the county seat, where most land records are kept. You'll also find Calverton Park, Black Jack, Berkeley, and Hazelwood, where town lots give way to larger tracts. About 987,059 people call St. Louis County home (Census Bureau estimate, 2023) spread over about 508 square miles. St. Louis County was organized in 1812, so old deeds can run back a long way. Landmarks such as Spanish Lake Park and Babler State Park are easy to spot when you zoom out from Ferguson.
Inside the parcel card
The record for a parcel near Ferguson typically lists owner, mailing address, assessed value and acreage.
When a parcel crosses a boundary
St. Louis County meets Madison County, IL, Monroe County, IL, St. Clair County, IL, Franklin County, and Jefferson County, and each of those keeps its own parcel map. Ground near Calverton Park that runs to the line can be split across two assessors' files, so open the neighboring map too. For a parcel near Black Jack, our state page lists each bordering county map for Missouri.
Field tips
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Dellwood, though signal can drop in rural spots. A saved image of the lot near Ferguson and its lines keeps working without signal.
Which office to call
For assessment questions about property around Dellwood are handled by the County Assessor, the office behind the parcel record. Zoning, permits and septic questions near Hazelwood need the planning or permitting office, depending on whether the land is inside town limits.
Quick answers
Are parcel lines on the map exact near Black Jack?
In most cases, lines near Hazelwood can be off by several feet or more.
How current is the parcel data near Berkeley?
Owner data near Calverton Park can lag new deeds by weeks.
Is the Florissant GIS map free?
Usually, the St. Louis County ArcGIS parcel map is free and opens without a login.
Is there a separate city GIS for Florissant?
In most cases, check the Florissant website or ask city hall; the county viewer remains the main parcel source.
What's a legal description around Ferguson?
For land near Berkeley, Deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
Open the official St. Louis County, MO parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.