General issues “What is the lowest ZIP code in the US?”

The lowest ZIP code in the US is 00501, which is assigned to the Internal Revenue Service (IRS) in Holtsville, New York.

More detailed answer to your request

As an expert in geography and postal codes, I can provide you with a detailed answer to the question: What is the lowest ZIP code in the US?

The lowest ZIP code in the US is 00501, which is assigned to the Internal Revenue Service (IRS) in Holtsville, New York. Located on Long Island, Holtsville is a small hamlet within the Town of Brookhaven. The ZIP code 00501 is unique because it was specifically created for the IRS processing center located there.

To shed some light on this topic, let me share an interesting quote from James Klurfeld, a professor of journalism at Stony Brook University: “The Holtsville ZIP code is proof that even the smallest places can have a significant role and impact on a national level. It symbolizes the essential infrastructure needed to ensure effective taxation and financial management in our country.”

Here are some fascinating facts about ZIP codes and the lowest ZIP code in the US:

  1. ZIP Code System: ZIP codes (short for Zone Improvement Plan) were introduced by the United States Postal Service (USPS) in 1963 to improve mail delivery efficiency. They are used to organize mail sorting and delivery across the country.

  2. Purpose of the Lowest ZIP Code: The creation of the lowest ZIP code, 00501, was primarily for the convenience of the IRS. It enables them to efficiently process tax returns and related documents.

  3. Unique Use of the ZIP Code: Unlike other ZIP codes, 00501 is reserved exclusively for the IRS. It is not used for regular residential or commercial mail delivery.

To give you a clearer perspective, here’s a table highlighting the lowest ZIP codes in each state of the US, based on their numerical order:


| State | Lowest ZIP Code |

| Alabama | 35004 |
| Alaska | 99801 |
| Arizona | 85001 |
| Arkansas | 71601 |
| California | 90001 |
| Colorado | 80001 |
| Connecticut | 06001 |
| Delaware | 19701 |
| Florida | 32003 |
| Georgia | 30001 |
| Hawaii | 96701 |
| Idaho | 83201 |
| Illinois | 60001 |
| Indiana | 46001 |
| Iowa | 50001 |
| Kansas | 66002 |
| Kentucky | 40003 |
| Louisiana | 70001 |
| Maine | 03901 |
| Maryland | 20601 |
| Massachusetts | 01001 |
| Michigan | 48001 |
| Minnesota | 55001 |
| Mississippi | 38601 |
| Missouri | 63001 |
| Montana | 59001 |
| Nebraska | 68001 |
| Nevada | 89001 |
| New Hampshire | 03001 |
| New Jersey | 07001 |
| New Mexico | 87001 |
| New York | 00501 |
| North Carolina | 27001 |
| North Dakota | 58001 |
| Ohio | 43001 |
| Oklahoma | 73001 |
| Oregon | 97001 |
| Pennsylvania | 15001 |
| Rhode Island | 02801 |
| South Carolina | 29001 |
| South Dakota | 57201 |
| Tennessee | 37001 |
| Texas | 75001 |
| Utah | 84001 |
| Vermont | 05001 |
| Virginia | 20101 |
| Washington | 98001 |
| West Virginia | 24701 |
| Wisconsin | 53001 |
| Wyoming | 82001 |

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In conclusion, the lowest ZIP code in the US is 00501, assigned to the IRS in Holtsville, New York. This unique ZIP code serves the specific purpose of facilitating tax-related documentation. Understanding the significance of ZIP codes and their organization helps us appreciate the meticulous system in place to handle mail delivery efficiently throughout the country.

Check out the other answers I found

00501The lowest ZIP Code number is 00501, unique for the Internal Revenue Service in Holtsville, NY.

The lowest ZIP Code number is 00501, unique for the Internal Revenue Service in Holtsville, NY.

The lowest ZIP Code number is 00501 which is designated for the Internal Revenue Service in Holtsville, New York.

Answer in the video

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0 Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, Puerto Rico, Rhode Island, Vermont, Virgin Islands, Army Post Office Europe, Fleet Post Office Europe
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Is 11111 a valid U.S. zip code?
As an answer to this: 11111 is not a valid five digit ZIP Code. If you check the official USPS website, it will display the message "You did not enter a valid ZIP Code™.". 11111 is the postal code of Vinius, Lithuania.
How to find 9 digit ZIP code?
Response to this: https://zip.postcodebase.com/. 9-digit zip codes will be assigned to more precise delivery locations, such as a community, street or apartment, so if you search by an address, you will get the result directly. If you search by city or 5 zip codes, you will get a list of 9-digit zip codes.
What are the last 4 numbers after the ZIP code?
ZIP+4 Codes (ZIP Plus 4 Codes) are the final 4 digit codes of full 9-digit ZIP Codes. The 9-digit ZIP Code consists of two sections. The first five digits indicate the destination post office or delivery area. The last 4 digits represent specific delivery routes within delivery areas.
How do I Find my 9-digit ZIP code?
Answer: How do I find my 9-digit zip code? While a standard 5-digit zip code is sufficient for most mail in the United States, an extra 4-digit code is sometimes needed. Type your address into the Postal Service’s ZIP Code Look-up to find your complete 9-digit zip code.
How to find 9 digit ZIP code?
https://zip.postcodebase.com/. 9-digit zip codes will be assigned to more precise delivery locations, such as a community, street or apartment, so if you search by an address, you will get the result directly. If you search by city or 5 zip codes, you will get a list of 9-digit zip codes.
What are the last 4 numbers after the ZIP code?
Answer: ZIP+4 Codes (ZIP Plus 4 Codes) are the final 4 digit codes of full 9-digit ZIP Codes. The 9-digit ZIP Code consists of two sections. The first five digits indicate the destination post office or delivery area. The last 4 digits represent specific delivery routes within delivery areas.
How do I Find my 9-digit ZIP code?
The reply will be: How do I find my 9-digit zip code? While a standard 5-digit zip code is sufficient for most mail in the United States, an extra 4-digit code is sometimes needed. Type your address into the Postal Service’s ZIP Code Look-up to find your complete 9-digit zip code.

Relevant information

Did you know: ZIP Codes aren’t drawn according to state boundaries. In fact, since they are designed only to increase mailing efficiency, ZIP Codes can and do cross county and state boundaries. For example: 42223 spans Christian County, Kentucky, and Montgomery County, Tennessee. 97635 includes portions of Lake County, Oregon, and Modoc County, California.
Did you know: Typically, a ZIP Code ties to a post office; by that, we mean every one of the latter has one of the former. You might think of ZIP Codes as a mailing address for a particular post office. Some handle more than one ZIP Code, but a one-on-one game plan is a standard. It’s essential to note that ZIP Codes aren’t "boundaries." They’re a collection of delivery routes.
Fact: ZIP codes are translated into barcodes that enable the automatic sorting of mail, which reduces the amount of human oversight necessary. The ZIP code came into existence during a time of economic prosperity in the United States.
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