Blog · October 14, 2026 · Iowa
The Clear Lake GIS Map and the county parcel viewer
Parcel data for Clear Lake comes from the county, and the viewer is free.
Main page: Cerro Gordo County, IA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Trying to size up a property near Plymouth? The Clear Lake GIS map answers most of that, with no account needed. In this Clear Lake guide: which viewer to open, how to search it, and what to double-check with records.
Getting started with the Clear Lake GIS map
In most places the county maintains the parcel layer, so for Clear Lake the go-to is the Cerro Gordo County Beacon site.
Pulling up a parcel
Begin with the Cerro Gordo County Beacon site; it covers each tax parcel in the county, Plymouth included. For a home near Swaledale, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. For a home near Swaledale, write down the parcel ID from that panel; each office in the county will want it.
City limits and county records
Clear Lake sits in Cerro Gordo County, Iowa, and the county assessor maps its lots. If the land is near Plymouth, City or town hall handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Lots just outside the town limits near Rockwell often answers to county rules, not municipal ones.
A quick look at the area
Mason City is the county seat, which is where the courthouse records live. You'll also find Ventura, Swaledale, and Thornton. Around 42,406 people live in Cerro Gordo County (Census estimate, 2023) on some 568 square miles. Cerro Gordo County dates to 1851, and some chains of title near Swaledale are long.
Printing and saving
Save a screenshot of the lot near Thornton and its record panel, so you have it when calling an office.
Reading the legal description
Iowa is laid out under the Public Land Survey System, which means a tract near Mason City is described by section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though corrections make some sections near Plymouth odd-sized. Keep the legal description for land near Ventura for any title or survey request.
Next door to Cerro Gordo County
Cerro Gordo County touches Butler County, Floyd County, Franklin County, Hancock County, and Mitchell County; every one of them runs a separate parcel map. A tract near the line by Ventura can show up across two assessors' files, so open the adjacent map too. Around Plymouth, our state page links each bordering county map for Iowa.
Deeds, plats and who keeps them
For anything that matters, request the recorded deed through the County Recorder; the parcel map near Ventura only summarizes it. Inherited tracts near Plymouth may sit on a long string of deeds, and a title company is worth hiring if money is changing hands.
A word on accuracy
Listed acreage is a tax-roll number; only a licensed surveyor sets the real boundary for a parcel near Plymouth. For a tract near Mason City, records update in batches, so a deed recorded last month might lag behind.
Finding the right lot
Vacant ground near Ventura may lack an address, so zoom in from the nearest road and click the outline. For land near Rockwell, searching by parcel number never misses, and it carries over to every office in the county.
Aerials, labels and overlays
For acreage around Ventura, look in the layer list for city limits, flood hazard, zoning or soils; availability varies.
Owner, value and acreage
Sales history, if listed, helps with pricing around Mason City give a rough idea of values; an appraiser is the real authority.
Field tips
Most viewers work in a phone browser, handy when you're parked on a road near Rockwell, though signal can drop in rural spots. A screenshot of the parcel near Swaledale with its ID helps when you meet an owner or agent.
Which office to call
Deeds, mortgages and recorded plats for land near Plymouth come from the County Recorder, sometimes only in person. Building or septic questions for a lot near Mason City are for the local planning and health departments, town or county, depending on location.
When the map won't load
If the viewer stalls on a phone near Rockwell, switch browsers or turn off pop-up blockers; the Platbookmapper county page tracks the current link.
Quick answers
How accurate is the parcel map near Ventura?
For most people, lines near Rockwell can be off by several feet or more.
Can I see aerial photos on the map near Mason City?
For acreage around Mason City, layer lists vary from one viewer to the next; open the layer list to see what's there.
Can I search by owner name in Clear Lake?
In most cases, click the lot near Ventura to see the owner.
Is there a separate city GIS for Clear Lake?
It depends, but check the Clear Lake website or ask city hall; the county viewer remains the main parcel source.
How do I save a parcel from the viewer in Clear Lake?
Use the print button or a screenshot; include the record panel for the lot near Plymouth.
Open the official Cerro Gordo County, IA 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.