Selfridge is a city in Sioux County, North Dakota, United States and on the Standing Rock Indian Reservation.

According to the United States Census Bureau, the town has a total area of 0.27 square miles (0.70 km2), all land.

The boxcar-depot was in pretty deplorable condition upon arrival; it took quite a bit of work to fix it up.

In the early days, trains were used extensively, for long distance travel by Selfridge residents and continued until the later 1940s.

Everything came in by train: groceries, lumber, fruit, coal, meat, machinery, mail and even ice.

The first business, a general store, was started in 1911, followed shortly by the Sioux Lumber Company later in 1911.

Horses were used for pulling wagons and for farming and most of the prairie was broken up with walking plows.

Travel was slow and difficult due to crude prairie trails and lack of roads.

For the first eight years after it was founded, Selfridge existed as an unorganized community without the benefit of municipal ordinances and local supervision—a real "wild west" sort of environment.

History repeated itself, when again in the 1950s the residents tried to have the county seat relocated from Fort Yates to Selfridge because it is more centrally located.

It contained 2 churches, 4 schools, 3 elevators, 2 garages, 3 implement dealers, 4 filling stations, 2 welding shops, 1 long distance phone, 1 lawyer, 1 pool hall, 2 banks, 1 public hall, 1 picture show, 4 general stores, 3 grocery and meat stores, 1 blacksmith shop, 1 feed barn, 1 rooming house, 2 restaurants, 4 real estate offices, 2 oil stations, 1 hotel, 1 hardware, 1 newspaper, 1 drug store, 1 barber shop, 2 cream stations, 3 contractors, 1 painter, 2 lumber yards, 2 confectioneries, 1 millinery shop, 1 footlocker, and 1 electric, and power & light company.

During the depression years of the thirties, many local men and area farmers supported their families by working on W.P.A.

The pay was anywhere from $25 to $42 per month depending on the type of work and job and whether the men furnished their own teams of horses.

Many of the Selfridge business places and homes have been lost to major fires through the years.

Farming practices in the Selfridge area have changed drastically over the past 100 years—trash cover on summer fallow, a faster coverage of all stages of farming including seeding, summer fallow, harvesting, etc., as well as chemicals used on weed and insect control, seed variety and treatment.

The Cedar Soil Conservation Office should be given credit here as they assisted in dam, dugouts, dike building, planning, surveying and financially.

Farmers and ranchers now spend long hours with the calculators and computers figuring out how to get the best production for the least cost.

The Milwaukee Road line that ran through the town was abandoned in 1983, leaving Selfridge without railway access.

The racial makeup of the town was 39.91% White, 59.19% Native American, 0.45% Pacific Islander, and 0.45% from two or more races.