Zip Code 19720 — New Castle, DE

ZIP Code 19720 is associated with New Castle, DE, in New Castle County. The listed population estimate is 62,392; estimated density is 628.9 people per square mile. Among records with population estimates, it ranks #1 of 26 in New Castle County and #1 of 65 in DE.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.645000, -75.606780)

Data MetricLocal Statistic
Postal / Zip Code19720
Primary CityNew Castle
State / ProvinceDE
CountyNew Castle
Total Population62,392
Population Density628.9 people/sq mi
TimezoneAmerica/New_York

How 19720 Compares

MetricZIP 19720New Castle County recordsDE records
Population estimate62,392573,431 (sum)1,021,605 (sum)
Population Density628.9 /sq mi----
County population rank#1 of 26----
State population rank#1 of 65----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in DE

ZIP CodeCityDistancePopulation estimate
ZIP 19804Wilmington5.0 mi18,779
ZIP 19706Delaware City5.2 mi2,038
ZIP 19713Newark5.8 mi30,747
ZIP 19733Saint Georges6.4 mi186
ZIP 19701Bear6.5 mi42,984

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →