New Castle, CO population, income and ZIP codes

New Castle town is a small town in Colorado, with 4,878 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #119 of 482 ranked by population — larger than 75% of them. The median age here is 37.4 years against 39.1 nationally, a slightly younger profile than the country as a whole. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in New Castle town earn a median of $88,421 a year, 12.6% above the national figure of $78,538 and within a couple of points of the $86,484 median for the 223 Colorado cities we cover. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 6.5% of residents here, below the 12.4% national rate.

The typical owner-occupied home in New Castle town is valued at $488,600, 61% above the national figure and 8% above the $453,600 peer median, while median gross rent runs $1,627 a month, 15.7% above the national figure, or roughly $19,524 across a full year. A household on the local median income would put about 22.1% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 5.5×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 70.8% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.