United States ZIP Code Dataset

Washington, D.C has 298 ZIP codes, ranging from 20001 to 56999. ZIP codes from 20001 to 20599 cover residential, business and administrative areas, while ZIP codes from 56901 to 56999 are used for parcel return services.

A 5-digit ZIP code in the United States is the basic USPS postal code made up of five digits (format: 99999) that identifies a specific geographic delivery area—city, town, or part of a city—to facilitate mail sorting and delivery.

Yes. The United States uses ZIP codes — a five-digit postal code format (99999) — to identify postal delivery areas covering all cities and addresses across the country. Additionnaly, the ZIP+4 (9-digit) extension provides greater delivery precision.

Yes — the United States uses ZIP codes as postal codes, typically five digits in the format 99999. Additionnaly, the ZIP+4 (9-digit) extension provides greater delivery precision.

The ZIP code 12345 is assigned to Schenectady, New York.

Yes. The United States uses a ZIP code system for postal addresses; the standard format is five digits (99999), and an optional ZIP+4 adds a hyphen and four extra digits for more precise routing.

The country code “US” (or “USA”) is sometimes mistakenly entered in the ZIP code field in the United States.

Typical U.S. address:

Recipient name
Street address (apartment/suite on same line or second)
City, two-letter state abbreviation ZIP code
Country (for international mail)

Example:
John Smith
123 Main St Apt 4B
Springfield, IL 62704
United States

The United States does not have a single ZIP code. ZIP codes are 5-digit numbers (format 99999) assigned to specific localities and delivery areas. Across the country, there are 52,971 localities served by 41,344 distinct ZIP codes.

The postal code (ZIP code) format in the United States is five digits: 99999. Additionnaly, the ZIP+4 (9-digit) extension provides greater delivery precision.

A standard ZIP code in the United States is 5 digits long. There is also the ZIP+4 format, written as 5 digits, a hyphen, then 4 additional digits (for a total of 9 digits).

Yes. United States mailing addresses typically include a five-digit ZIP code (format 99999); for greater precision a ZIP+4 (99999-1234) may be used. Including the ZIP code is standard and required for proper postal routing.

ZIP code 20500 is assigned to the White House at 1600 Pennsylvania Avenue NW, Washington, D.C., United States.