Monrovia, CA Zip Codes: Complete Guide

Nick Leason

-Oct 22, 2025

Looking for the zip code for Monrovia, California? Monrovia is a city nestled in Los Angeles County, known for its charming downtown, historic architecture, and proximity to the Angeles National Forest. This guide provides a comprehensive overview of Monrovia's zip codes, helping you quickly find the information you need, whether you're sending mail, researching real estate, or simply curious about this vibrant Southern California community.

Key Takeaways

Monrovia primarily uses the zip code 91016.
Some businesses and residents may also use 91017.
Understanding zip codes helps with mail delivery, locating services, and understanding local demographics.
This guide provides insights into Monrovia's neighborhoods and how zip codes relate to them.

Introduction

Monrovia, California, is a city with a rich history and a strong sense of community. Its location at the base of the San Gabriel Mountains offers residents stunning natural beauty and easy access to outdoor activities. Like any city, Monrovia is divided into different areas, and zip codes are essential for organizing these areas. These five-digit codes are more than just postal codes; they are integral to a variety of services and data analyses. This guide focuses on the zip codes that serve Monrovia, ensuring you have accurate information for your needs. — Charleston In February: Weather, Things To Do & More

What & Why

Zip codes, like the ones used in Monrovia (primarily 91016), are crucial for the efficient delivery of mail by the United States Postal Service (USPS). They help sort and route mail, ensuring it arrives at the correct destination quickly and accurately. But their use extends far beyond the postal service.

Why Zip Codes Matter

Mail Delivery: The primary function is, of course, to ensure the correct delivery of mail and packages. Without zip codes, sorting mail would be significantly more time-consuming and prone to errors.
Geographic Information: Zip codes help define geographic areas, allowing for the analysis of demographic data, such as population density, income levels, and household characteristics. This information is vital for businesses, government agencies, and researchers.
Service Areas: Many services, from delivery companies to emergency services, use zip codes to define their service areas. Knowing the zip code ensures you can access the appropriate services in your location.
E-commerce: When shopping online, zip codes are essential for calculating shipping costs and taxes, as well as for verifying the delivery address.
Local Identification: Zip codes help establish a sense of local community and identity. They allow residents to easily identify with their neighborhood and connect with local services and organizations.

Benefits of Knowing Monrovia Zip Codes

Accurate Mail: Ensure that your mail and packages are delivered without delay.
Local Services: Easily locate and access services specific to your area.
Online Shopping: Accurately calculate shipping costs and taxes when shopping online.
Community Awareness: Stay informed about local events and information relevant to your zip code area.
Real Estate: Useful when researching properties and understanding neighborhood demographics.

Potential Risks of Incorrect Zip Codes

Delayed Mail Delivery: Incorrect zip codes can lead to delays in mail and package delivery.
Misdirected Mail: Inaccurate zip codes can result in mail being sent to the wrong location.
Service Issues: Using the wrong zip code could affect your access to local services and resources.
Misinformation: Incorrect zip codes can skew demographic data and lead to inaccurate conclusions.

How-To / Steps / Framework Application

Finding the correct zip code for Monrovia, California, is straightforward. Here’s a simple guide:

Identify Your Address: Determine the exact street address you need the zip code for. This is crucial as zip codes can vary slightly within the city depending on the specific location.
Use Online Resources: Utilize online search engines or websites like the USPS website to look up the zip code based on your address. You can search by entering your street address and city (Monrovia, CA).
Use a Map: Online mapping tools can also help you visually identify the zip code for a particular area within Monrovia. Zoom in on your location and check for zip code boundaries.
Confirm the Result: Always double-check the zip code to ensure it’s accurate. Mistakes can lead to delivery delays or misdirected mail.
For Businesses: Businesses should verify the correct zip code for their mailing address to ensure smooth operations and proper mail routing.

Step-by-Step Guide to Finding a Monrovia Zip Code

Go to the USPS Website: Navigate to the official USPS website's zip code lookup tool.
Enter Address Information: Input your street address, city (Monrovia), and state (California).
Click “Find”: The tool will then provide the zip code associated with that address.
Verify: Confirm that the displayed address matches your intended location.
Record and Use: Note down the zip code and use it for all relevant correspondence.

Examples & Use Cases

Here are some real-world examples of how knowing the zip code for Monrovia, CA, is used:

Residential Mail and Packages

Scenario: You are ordering a package online and need to provide the correct zip code for your home address in Monrovia.
Application: Entering the correct zip code (91016 or 91017) ensures the package is delivered to your doorstep without issue.

Business Correspondence

Scenario: A local business in Monrovia is sending out invoices and marketing materials.
Application: Including the correct zip code on all outgoing mail ensures efficient delivery to customers, partners, and other contacts.

Real Estate Transactions

Scenario: You are interested in buying a home in Monrovia and want to understand the neighborhood demographics.
Application: Knowing the zip code allows you to research the area's population, income levels, and school districts, which can influence your decision.

Local Services

Scenario: You are a new resident in Monrovia and need to find a local service provider, such as a plumber or electrician.
Application: Using the zip code, you can search for local businesses that serve your specific area, ensuring prompt and convenient service.

Online Shopping

Scenario: You are shopping online and need to calculate shipping costs for an item to be delivered to Monrovia.
Application: Entering the correct zip code allows the online retailer to accurately calculate the shipping fees and sales tax based on your location.

Best Practices & Common Mistakes

To ensure you are using zip codes correctly in Monrovia, consider the following best practices and common mistakes to avoid:

Best Practices

Verify Addresses: Always double-check the address and zip code when sending mail or providing information.
Use the USPS Website: The official USPS website is the most reliable source for zip code information.
Update Regularly: Ensure that the zip codes used in your address book or contact lists are up-to-date, especially if you move or if there are any changes in zip code boundaries.
Consistency: Use the same zip code format across all your correspondence to avoid confusion.
Use Complete Addresses: Always include the full street address, including apartment or suite numbers if applicable, along with the zip code.

Common Mistakes

Incorrect Zip Codes: The most common mistake is entering the wrong zip code. This can lead to delivery delays or misdirected mail.
Outdated Information: Using an outdated zip code can result in delivery issues. Always use the most current information.
Missing Information: Omitting crucial address details like apartment numbers can cause delivery problems.
Typos: Simple typos in the zip code can lead to mail being sent to the wrong location.
Assuming: Don't assume that all addresses in a particular area use the same zip code. Verify each address individually.

FAQs

What is the primary zip code for Monrovia, CA? The primary zip code for Monrovia, CA, is 91016.
Are there any other zip codes used in Monrovia? Yes, some areas of Monrovia may also use the zip code 91017. — Newfoundland & Labrador Shipping Guide: Costs & Options
How do I find the zip code for a specific address in Monrovia? You can use the USPS website's zip code lookup tool by entering the street address, city (Monrovia), and state (California).
Why is it important to use the correct zip code? Using the correct zip code ensures accurate mail delivery, allows you to locate local services, and helps online retailers calculate shipping costs and taxes accurately.
Can zip codes change? Yes, zip code boundaries can change over time. It's always a good idea to verify the current zip code information, especially when moving or if you have concerns about mail delivery. — PA Home Store: Your Feasterville, PA Furniture Destination
Where can I find a map of Monrovia zip codes? While the USPS website provides zip code lookup, online mapping tools often display zip code boundaries visually. Search online for "Monrovia, CA zip code map."

Conclusion with CTA

Knowing the zip codes for Monrovia, California, is essential for smooth and accurate mail delivery, accessing local services, and more. This guide has provided you with the necessary information to ensure you are using the correct zip codes for your needs.

For more information on Monrovia, CA, including local businesses, events, and community resources, visit the official City of Monrovia website. Stay informed, and stay connected with your community.

Last updated: October 26, 2023, 10:00 UTC