In 2023, Newcastle, TX had a population of 614 people with a median age of N/A and a median household income of $63,750. Between 2022 and 2023 the population of Newcastle, TX declined from 634 to 614, a −3.15% decrease and its median household income grew from $55,625 to $63,750, a 14.6% increase.
The 5 largest ethnic groups in Newcastle, TX are White (Non-Hispanic) (82.7%), White (Hispanic) (9.93%), Two+ (Non-Hispanic) (5.05%), Other (Hispanic) (1.3%), and Black or African American (Non-Hispanic) (0.977%).
None of the households in Newcastle, TX reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.