The Dawes Act is one of those laws that reads like a math problem until you realize what the arithmetic actually did to people's lives. Approved on February 8, 1887, the law known formally as "An Act to Provide for the Allotment of Lands in Severalty to Indians on the Various Reservations" set out a precise formula for splitting communally held reservation land into individual parcels. Using the National Archives' own Milestone Documents entry as a guide, here is how that formula worked, who selected the land, and what happened to everything left over.
Who wrote it, and what it was meant to do
The law is named for its author, Senator Henry Dawes of Massachusetts, and it authorized the President to break up reservation land that tribes held in common, dividing it into small allotments to be parceled out to individuals. The National Archives describes the guiding idea behind the law as "severalty": the treatment of Native Americans as individuals rather than as members of a tribe. The official citation for the law itself is Statutes at Large 24, 388-91, catalogued by the National Archives as NADP Document A1887, and it is also referenced in an Archives educator resource as Our Documents number 50.
The allotment formula, tier by tier
A separate summary from Britannica Kids restates the two largest tiers in plainer terms, noting that a married Indigenous man received 160 acres while an unmarried man received 80 acres, figures that line up with the Act's own one-quarter and one-eighth section amounts. Set side by side, the four tiers in the Act's own text run from a head of family's one-quarter section down to one-eighth for a single adult or orphan child and one-sixteenth for other single minors.
- Head of a family — one-quarter of a section, which under the standard 640-acre section used in the U.S. Public Land Survey System works out to 160 acres
- Single person over eighteen — one-eighth of a section, or 80 acres under that same standard conversion
- Orphan child under eighteen — one-eighth of a section, also 80 acres, matching the allotment given to a single adult
- Any other single minor under eighteen, living at the time of the President's allotment order or born before it — one-sixteenth of a section, or 40 acres, the smallest tier in the formula
Working the formula for a head of family
Here is how the largest allotment tier actually breaks down using the standard meaning of a 'section' in U.S. land surveying. A full section of land equals 640 acres, and the Act granted a head of family one-quarter of a section. Multiplying 640 acres by one-quarter gives 160 acres — the figure most people associate with the Dawes Act, and the number that matches Britannica Kids' plain-language description of what a married Indigenous man received. The same math, just with smaller fractions, explains the 80-acre tier for a single person over 18 or an orphan child under 18 and the 40-acre tier for other single minors under 18.
- section acres: 640 - Formula: section acres\\(1/4\) - Result: 160
Who actually chose the parcels
The Act did not let government agents simply hand people a map square. Section 2 specified that allotments were to be selected by the Indians themselves, with heads of families selecting on behalf of their minor children. For orphan children, who had no parent to select on their behalf, the law assigned that task to government agents instead. The Act also required that selections be made in a way that included any improvements — meaning existing structures or cultivated land — that the person making the selection had already made, so families were not forced to abandon land they had already developed.
What happened to the land nobody was allotted
Once a tribe sold or released agricultural land to the United States, that unallotted 'surplus' land was to be held by the federal government specifically to provide homes to actual settlers, and it could only be sold to bona fide settlers in tracts no larger than 160 acres per person, on terms Congress would set, subject to any land grants Congress made for education. This provision applied only to reservation land left over after individual allotments had been carved out, and only once a tribe had agreed to sell or release it to the United States.
How the policy expanded after 1887
In 1893, President Grover Cleveland appointed the Dawes Commission to negotiate with the Cherokee, Creek, Choctaw, Chickasaw and Seminole nations, collectively known as the Five Civilized Tribes. Those negotiations led to additional acts that allotted a share of common tribal property to individual members of those five tribes, but only in exchange for abolishing their tribal governments and recognizing state and federal law.
The scale of what was lost Britannica reports that, across the full span of the allotment era that followed the 1887 Act, the government used this framework to take more than 90 million acres of tribal land and sell it to non-Native people. That cumulative figure covers land sold as 'surplus' after individual allotments were carved out, plus other losses over the following decades, though the exact end date of the period being counted is not specified in that source. It is worth sitting with that number alongside the allotment formula above — the formula gave something to individuals while structurally guaranteeing that a large share of reservation land would end up outside tribal hands entirely.
Source: kids.britannica.com
Key takeaways
- The Dawes Act, approved February 8, 1887, authorized breaking up communally held reservation land into individual allotments, based on the policy of 'severalty'
- Allotment sizes were tiered by household status and age: 160 acres for a head of family, 80 acres for a single adult over 18 or an orphan under 18, and 40 acres for other single minors under 18 who were living at the time of the President's allotment order or born before it
- Indians selected their own allotments, with heads of families choosing for minor children and government agents choosing for orphans
- Once a tribe sold or released 'lands adapted to agriculture' to the United States, that unallotted 'surplus' land was reserved for sale only to 'actual and bona fide settlers,' in tracts of up to 160 acres each, on terms Congress prescribed and subject to any education-related land grants
- In 1893 President Cleveland appointed the Dawes Commission to negotiate with the Five Civilized Tribes, and the resulting acts allotted their communal land in exchange for abolishing their tribal governments and recognizing state and federal law
- Over the broader allotment era, more than 90 million acres of tribal land were ultimately sold to non-Native people
Allotment sizes by category, converted to acres
| Category | Fraction of a section | Resulting acreage |
|---|---|---|
| Head of a family | One-quarter | 160 acres |
| Single person over 18 | One-eighth | 80 acres |
| Orphan child under 18 | One-eighth | 80 acres |
| Other single minor under 18, living or born before the President's allotment order | One-sixteenth | 40 acres |
Allotment sizes under the Dawes Act's own tiered formula, expressed in both the Act's section fractions and the resulting acreage, with the timing condition for non-orphan minors noted separately below.
Frequently asked questions
Did the Dawes Act apply to all tribes starting in 1887?
Not uniformly. The original Act's provisions were later extended to additional groups; in 1893 President Cleveland appointed the Dawes Commission to negotiate with the Cherokee, Creek, Choctaw, Chickasaw and Seminole nations, and the resulting acts allotted land to their members only after those tribes agreed to abolish their tribal governments and recognize state and federal law.
How big was a 'section' used in the allotment formula?
The Act's text uses fractions of a section rather than naming acreage outright, and a section is standardly defined as 640 acres under the U.S. Public Land Survey System, which is the conversion used to arrive at the 160-acre, 80-acre and 40-acre figures described above.
Who picked which specific parcel a person received?
The Act gave that choice to the Indians themselves, with heads of families also selecting on behalf of their minor children; government agents selected parcels only for orphan children who had no parent to choose for them, and selections were meant to include any improvements already made on the land.
What happened to reservation land that was not allotted to anyone?
Once a tribe sold or released that unallotted agricultural land to the United States, the government held it for the purpose of providing homes to settlers, selling it only to actual, bona fide settlers in tracts of no more than 160 acres per person, under terms set by Congress and subject to any grants Congress might make in aid of education.
How much land did tribes ultimately lose through this system?
Britannica reports that, over the broader allotment era following the 1887 Act, the government used this framework to take and sell more than 90 million acres of tribal land to non-Native people, though the exact end date covered by that cumulative figure is not specified.