How Many Acres in a Township: A Plain-Language Guide to the PLSS Grid

How Many Acres in a Township? 23,040, No Asterisk

A standard township is 36 square miles. That's 23,040 acres, built from 36 sections of 640 acres each. If you've got a legal description in front of you that says something like "Township 4 North, Range 7 West," that's the number you're working with before you even get to which section or quarter-section is actually yours.

No hedging on that math. It's fixed by design. Where things get less tidy is in how that 23,040 gets divided on the ground, and that's the part most landowners never learn until a deed doesn't quite add up.

Where the 23,040-Acre Number Comes From

The Public Land Survey System, or PLSS, carved up most of the country into a repeating grid starting in the 1780s. The logic is simple once you see it laid out:

One section equals one square mile, which equals 640 acres. Line up 36 of those sections in a 6-by-6 block, and you've got a township: 36 sections times 640 acres per section equals 23,040 acres. That's the whole equation.

Sections get numbered 1 through 36 inside a township, starting in the northeast corner and snaking back and forth (a pattern called boustrophedon, though nobody needs to remember that word to use it). Section 16, dead center-ish, was historically set aside to fund public schools in a lot of states, which is a fun bit of trivia if you ever wonder why so many rural schools sit on oddly specific parcels.

If you want the next layer down, the quarter-section and smaller splits, we've laid out that math in how many acres in a section, which covers how 640 acres gets divided into halves, quarters, and quarter-quarters for actual deeds.

Where the PLSS Grid Applies (and Where It Doesn't)

The township-and-range system covers most of the country: the Midwest, the Great Plains, the Mountain West, the Pacific states, and a good chunk of the South. If your land is in Ohio, Iowa, Nebraska, Colorado, or most places west of the Appalachians, there's a strong chance your legal description runs through this grid.

It does not cover everywhere. The original 13 colonies were already surveyed under older systems (metes and bounds, mostly) before the PLSS existed, so states like Virginia, Pennsylvania, and the Carolinas largely sit outside it. Texas has its own survey history tied to Spanish and Mexican land grants. Hawaii is different too. If your deed reads more like a story ("beginning at the oak tree, thence 200 rods to the creek") than a grid coordinate, you're in metes-and-bounds territory, not PLSS.

The Catch: Textbook Acreage vs. Your Actual Deed

Here's where owners get surprised, and where I'd push back on anyone who treats 23,040 acres, or 640 acres per section, as gospel for a specific piece of ground.

The PLSS grid was surveyed by hand, on foot, across hills, rivers, and swampland, using chains and compasses over a century and a half. Meridians (the north-south survey lines) converge as you move north, because the earth is round and lines running true north eventually meet at the pole. To correct for that convergence, surveyors built in "correction lines" every so often, which means the townships and sections along those lines often come up short or long compared to the textbook square mile.

The practical result: a "quarter section" that's supposed to be 160 acres might deed out at 157, or 164. Sections along the north and west edges of a township are the usual suspects for these fractional adjustments, sometimes called "government lots" instead of clean quarter-quarters. None of this is a mistake. It's baked into how the original surveys were corrected for the curve of the earth. But if you're buying, inheriting, or financing land based on an assumed acreage, the gap between the math and the deed is exactly the kind of thing that should get checked, not assumed.

This matters most when you're doing real money math: cash rent per acre, a solar lease payment per acre, a loan-to-value calculation. A 3-acre gap on a 160-acre quarter section is nearly 2% of your base number, and that compounds across every per-acre figure downstream.

What This Means for Your Parcel, Specifically

Knowing the township-and-range math is step one. It tells you how your land is described on paper. It does not tell you what your land is actually worth, how it drains, what it'll yield, or what a solar developer should really be offering you per acre.

That's a different question, and it's the one that actually matters this time of year. If you're an heir sorting out what to do with inherited farmland, or a buyer who wants the yield history before closing, or an owner trying to benchmark cash rent for your county before signing a fall lease, the section-and-township number is just the starting coordinate. The real answer lives in soil data, flood risk, and comparable rents tied to your exact acreage, not the rounded-off number from a textbook grid.

Run your parcel's free analysis at Agriterra Scout and get the plain-language read on soil, solar, wind, water, flood risk, value, and cash rent for your actual acreage, not the 640-acre assumption. No GIS degree, no surveyor on retainer, under a minute from address to answer.