Postal Code 61773 - Sibley, Illinois, United States
Postal Code: 61773
Postal System Details
Postal Authority
United States Postal Service (USPS)
Postal System
Five-digit ZIP Code with optional ZIP+4
Region Structure
State → County → City/Town → Delivery Route
Area Information
The postal code 61773 is part of the U.S. ZIP Code system, developed and managed under the operational framework of the United States Postal Service (USPS), the national postal authority for United States. ZIP codes follow the five-digit format X X X X X, with an optional ZIP+4 extension X X X X X–X X X X. A general ZIP pattern example is 9 0 0 X X (illustrative only). The first digit identifies the broad region, the next two define the sectional center facility (SCF), and the final digits specify the local delivery route. This code corresponds to Sibley in Illinois, located near coordinates 40.5823 and -88.3815. U.S. routing typically follows State → County → City/Town → Delivery Route. Example flow: - State: Illinois - County: (Example: Central County District) - City/Town: Sibley - Delivery Route: Determined by the final digits This page reflects USPS routing principles. All examples are illustrative and not the actual assignment for 61773. For accurate verification, ensure the city and county match Sibley, Illinois, United States.
Country:
United States
State:
Illinois
Area:
Sibley
Postal Code:
61773
Latitude:
40.5823
Longitude:
-88.3815
Frequently Asked Questions
1. What area does the ZIP code 61773 cover?
It represents the delivery area assigned to Sibley in Illinois, under USPS routing.
2. How do U.S. ZIP Codes work?
They follow X X X X X or ZIP+4, identifying region, SCF, and delivery route.
3. Can 61773 verify an address?
Yes, if the city and county match Sibley, Illinois, United States.
4. Which authority manages ZIP Codes in the United States?
The United States Postal Service (USPS) manages all ZIP Code routing and assignments.