As of the census of 2010, there were 810 people, 313 households, and 196 families residing in the city. The population density was. There were 352 housing units at an average density of. The racial makeup of the city was 25.2% White, 71.4% Native American, 0.2% Asian, 0.1% from other races, and 3.1% from two or more races. Hispanic or Latino of any race were 0.6% of the population. There were 313 households of which 40.9% had children under the age of 18 living with them, 31.3% were married couples living together, 19.2% had a female householder with no husband present, 12.1% had a male householder with no wife present, and 37.4% were non-families. 32.3% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.16. The median age in the city was 31.2 years. 30.7% of residents were under the age of 18; 10.8% were between the ages of 18 and 24; 25% were from 25 to 44; 25% were from 45 to 64; and 8.4% were 65 years of age or older. The gender makeup of the city was 50.2% male and 49.8% female.
2000 census
As of the 2000 census, there were 911 people, 325 households, and 206 families residing in the city. The population density was 3,406.0 people per square mile. There were 350 housing units at an average density of 1,308.5 per square mile. The racial makeup of the city was 32.16% White, 0.11% African American, 63.67% Native American, 0.77% Asian, 0.22% from other races, and 3.07% from two or more races. Hispanic or Latino of any race were 0.88% of the population. There were 325 households out of which 33.5% had children under the age of 18 living with them, 36.9% were married couples living together, 19.4% had a female householder with no husband present, and 36.6% were non-families. 32.3% of all households were made up of individuals and 12.6% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.26. In the city, the population was spread out with 30.7% under the age of 18, 8.0% from 18 to 24, 29.6% from 25 to 44, 20.2% from 45 to 64, and 11.4% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 106.1 males. For every 100 females age 18 and over, there were 102.9 males. The median income for a household in the city was $24,896, and the median income for a family was $29,688. Males had a median income of $22,250 versus $19,000 for females. The per capita income for the city was $10,579. About 23.4% of families and 31.5% of the population were below the poverty line, including 32.6% of those under age 18 and 22.2% of those age 65 or over.
Poplar Public Schools, District 9/2B, is the second largest public school system on the Fort Peck Indian Reservation with a total enrollment of 824 students for the 2006-2007 school year. Poplar Public Schools operates elementary, middle, and junior/senior high schools.
, a major east-west route across the northern tier of states, connects Poplar with other Hi-line communities in Montana and North Dakota. The Poplar airport provides for light aircraft and general aviation on a single runway. Amtrak serves Wolf Point, about 20 miles west.
Medical facilities
The Indian Health Service operates the Vern E. Gibbs Health Center through its Fort Peck Service Unit. The health center provides ambulatory, dialysis, and preventive health services. The IHS contracts with Northeast Montana Health Services which operates Poplar Community Hospital, a critical access hospital with an emergency room, swingbed unit, pharmacy, 22-bed inpatient facility for inpatient services, as well as the Riverside Clinic, and hospital and clinic in Wolf Point, Montana. Poplar has a BLS and ALS ambulance staffed by first responders and EMTs. The ambulance service averages 4.5 calls a day.
