New Underwood, South Dakota

New Underwood (Lakota: wóȟešma tȟéča; "new undergrowth") is a city in Pennington County, South Dakota, United States. The population was 590 at the 2020 Census.

New Underwood got its start circa 1906. The city was named for John Underwood, a cattleman. Until 2017, it was home to the world’s smallest biker bar, which is now closed.

Geography
According to the United States Census Bureau, the city has a total area of 1.00 sqmi, all land.

2010 census
As of the census of 2010, there were 660 people, 248 households, and 162 families living in the city. The population density was 660.0 PD/sqmi. There were 280 housing units at an average density of 280.0 /sqmi. The racial makeup of the city was 89.5% White, 6.4% Native American, 0.2% Asian, 0.8% from other races, and 3.2% from two or more races. Hispanic or Latino of any race were 2.7% of the population.

There were 248 households, of which 34.3% had children under the age of 18 living with them, 47.6% were married couples living together, 13.7% had a female householder with no husband present, 4.0% had a male householder with no wife present, and 34.7% were non-families. 28.6% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.09.

The median age in the city was 39.9 years. 27.4% of residents were under the age of 18; 6.5% were between the ages of 18 and 24; 23.2% were from 25 to 44; 26.9% were from 45 to 64; and 16.1% 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 census of 2000, there were 616 people, 232 households, and 174 families living in the city. The population density was 616.0 PD/sqmi. There were 265 housing units at an average density of 265.0 /sqmi. The racial makeup of the city was 93.34% White, 5.84% Native American, and 0.81% from two or more races. Hispanic or Latino of any race were 1.14% of the population.

There were 232 households, out of which 40.1% had children under the age of 18 living with them, 53.4% were married couples living together, 14.2% had a female householder with no husband present, and 24.6% were non-families. 20.3% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.02.

In the city, the population was spread out, with 31.3% under the age of 18, 6.2% from 18 to 24, 28.6% from 25 to 44, 20.0% from 45 to 64, and 14.0% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 97.4 males. For every 100 females age 18 and over, there were 94.9 males.

The median income for a household in the city was $32,750, and the median income for a family was $36,111. Males had a median income of $25,096 versus $21,442 for females. The per capita income for the city was $14,729. About 4.8% of families and 8.0% of the population were below the poverty line, including 6.5% of those under age 18 and 15.2% of those age 65 or over.