Who Lives in Newcastle: Small and Homogeneous Population
The city has just over three thousand residents, mostly of European descent, with a small Hispanic and Indigenous presence from nearby reservations in South Dakota.
Newcastle is a small community, with a population estimated at around 3,200 within city limits and approximately 7,000 in Weston County as a whole. The demographic composition is predominantly white, with roots in German, English, Irish, and Scandinavian settlers who arrived in the region in the late 19th century during the coal and railroad boom.
A Hispanic minority has grown over the past two decades, tied to work in refining, construction, and services. There is also an Indigenous presence, primarily Lakota and Cheyenne, coming from the Pine Ridge and Cheyenne River reservations across the South Dakota border. Mormon families maintain an active chapel in the city.
The median age is higher than the national average, reflecting the exodus of young people to Gillette, Rapid City, or Denver in search of university and urban employment. English dominates daily life, with Spanish present in some businesses and the local Catholic church.
- English
- Spanish
- Protestant Christianity
- Roman Catholicism
- Mormonism (LDS)
- No religion