Blog · September 30, 2026
What Is a Fractional Section?
A fractional section is a section the government survey could not lay out as a full regular mile square, often because of water, a prior grant, or the edge of the township. Its odd pieces are usually numbered government lots. The word fractional is a survey fact, not a comment that the deed is incomplete.
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Why the section is short
A regular section is the ideal. A lake, a river that was meandered, an older land grant, a reservation boundary, or the leftover north and west tiers of a township can cut a section into an irregular shape. The surveyor ran what lines could be run, set corners, meandered the water if the instructions required it, and numbered the leftover parcels as lots. On the township plat those lots show areas that are not the familiar 40 and 160. The section is still Section 4 or Section 18. Fractional describes its shape in the official survey. It does not mean the patent conveyed an undivided fraction of a regular section to several owners, which is a different use of the word fraction in deeds.
How a deed refers to it
A patent or a later deed may say the lot 2 of fractional section 8, with the township, range, and meridian. The word fractional warns you not to expect four even quarters. Open the plat. If someone conveys the northeast quarter of a fractional section, read whether that quarter was actually surveyed as a regular quarter or whether the northeast of that section is a stack of government lots. Aliquot language pasted onto a fractional section can overshoot into the water or into the next grant. The plat resolves it. The county parcel layer may have already chopped the fractional section into tax parcels that follow later private deeds. Those parcels are not a new government survey.
Reading the acreage column
The official plat lists acres for each government lot. Those figures were used to pay for the land and to write the patent. A modern computation from coordinates can differ slightly without meaning the plat was wrong. What you should not do is scale the fractional section up to 640 acres and claim the difference from a neighbor or from the state. The missing area may be water, a prior grant, or the township’s planned leftover. A phone GPS acreage tool is not a survey of that question. If a title company asks for a survey of a fractional lot, they want a licensed surveyor to tie the deed to the monuments and the plat, not a screenshot with a shaded polygon.
What to do next
- When you see fractional section, get the township plat before you sketch quarters.
- Identify numbered government lots separately from aliquot parts.
- Use the plat acreage as the record area of each lot.
- Do not inflate the section to a full 640 acres.
The mix-up to avoid
Ignoring the word fractional and drafting the northeast quarter as if the section were regular. On a meandered section that quarter may be a shoreline lot with a very different shape.
Questions people ask
Is a fractional township the same thing?
A fractional township is a township that is not a full six miles square. A fractional section is one section inside some township, full or not, that was not surveyed as a regular square. You can have either without the other. The plat label tells you which word applies.
Does fractional mean the owner shares the section with the government?
No. It describes the survey geometry. Title depends on the patent and later deeds. Some land inside the township square may never have been patented to a private owner because it was water or was excluded. That is a title fact you read in the patent, not a guess from the word fractional.
Find the county map
Search the county on the Platbookmapper home page. The directory links to the official parcel viewer. It does not draw the lots, and the line on the screen is an assessment map, not a survey.
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.