Mexico Address Format: How to Write a Mexican Address Correctly

What is the correct Mexico address format? A Mexican address is written street-first, with the 5-digit código postal placed on the same line as the colonia (neighborhood) and the municipality/state below it — for example: Sra. Ana López / Calle Reforma 245, Int. 3 / Col. Roma Norte, C.P. 06700 / Cuauhtémoc, Ciudad de México. If you are sending from the United States, add MEXICO as the final line so USPS and UPS route the parcel to the right country.

What Is the Correct Mexico Address Format?

A correctly formatted Mexican address groups information differently than a US one — the postal code sits with the neighborhood, not the city. Guidance from Correos de México (SEPOMEX) and Mexican carrier standards give this structure:

• Addressee’s name
• Company or department name (business mail only)
• Street name (calle/avenida) + exterior number (número exterior) + interior number if applicable (número interior, often written “Int.”)
• Colonia (neighborhood), abbreviated “Col.”, followed by the 5-digit postal code (C.P.)
• Municipality or borough (delegación/alcaldía in Mexico City) and state

The street line and the colonia/postal-code line each carry equal routing weight in Mexico’s addressing system — a Mexican sorter checks the colonia against the postal code before it ever reaches the street name. When a US shipper prepares a label through a platform like ParcelPath’s Mexico shipping page, that same order applies, with one addition covered below: the destination country on the final line.

What Are the Essential Components of a Mexican Address?

Each line does a specific job in Mexico’s delivery chain. The two lines that surprise US senders most are the colonia (a routing unit with no real US equivalent) and the postal code’s mid-address position.

Line	What it is	Example	Required?
Recipient	Person or business receiving the item	Sra. Ana López	Yes
Street line	Calle/avenida + exterior number + interior number	Calle Reforma 245, Int. 3	Yes
Colonia	Neighborhood/settlement — a real routing unit, not decorative	Col. Roma Norte	Yes
Postal code	5-digit código postal (C.P.), on the colonia line	C.P. 06700	Yes
Municipality/borough	Municipio, or delegación/alcaldía in Mexico City	Cuauhtémoc	Yes
State	Estado (spelled out; no standard 2-letter abbreviation in postal use)	Ciudad de México	Yes
Country	Destination country for international mail	MEXICO	Yes (from abroad)

The single most common surprise for US senders is that the colonia genuinely changes the routing, not just the postal code. SEPOMEX’s postal-code lookup tools exist specifically because one 5-digit code can span multiple colonias in dense urban areas — leaving it off, or guessing it, is the fastest way to stall a Mexico-bound parcel.

How Does the Mexican Postal Code System Work?

The Mexican código postal is five digits, with no letters and no hyphen, and it carries clear geographic meaning built into the number itself (per the Universal Postal Union’s Mexico addressing reference and Wikipedia’s breakdown of the system):

• First two digits — identify the state, or in Mexico City’s case, the specific borough (01–16 cover Mexico City’s boroughs; 20–99 cover the 31 states, assigned in a rough alphabetical pattern going back to older Spanish spellings).
• Last three digits — narrow the code down to a specific municipality, colonia, or in some cases an individual large-volume address.

Placement is the detail that trips up international senders: the postal code sits on the colonia line, not on its own final line the way a US ZIP code or Canadian postal code does. Writing “C.P.” before the digits (e.g., C.P. 06700) is standard practice and helps a human reader distinguish it from a street or interior number, though the digits alone are what automated sorting equipment reads. Mexico does not use a standardized 2-letter state abbreviation in postal addressing the way the US or Brazil do — the state name is typically spelled out on the final line.

How Do You Address a Mexican Parcel From the United States?

Shipping into Mexico from the US adds exactly one rule to everything above: the last line of the address must be the destination country — MEXICO (or MÉXICO). USPS and UPS sort outbound international parcels by that country line first, before the postal code is ever read, so omitting it is the fastest way to have a package held or returned to sender.

Practical points for US-origin Mexico shipments:

• Keep the colonia on the label even though it has no direct US equivalent — treat it as a required field, not an optional detail, and verify it against the postal code using SEPOMEX’s lookup tool before shipping.
• Accented characters (á, é, í, ó, ú, ñ) are standard in Spanish street and colonia names — most modern carrier systems handle them, but if a label generator strips accents, the address is still deliverable as long as the postal code and colonia are correct.
• Include a working phone number and email in the label’s contact fields — Mexican customs (SAT/ANAM) and last-mile couriers use them for duty contact and delivery notifications.
• Both USPS and UPS reach every Mexican state. ParcelPath issues discounted USPS and UPS labels for the Mexico lane; the Mexico destination guide covers current transit windows and customs paperwork.

For the customs side of a Mexico parcel — the CN22/CN23 declaration, IVA/duty thresholds, and USMCA-related documentation — see our international shipping hub, which walks through the paperwork that keeps a parcel out of a customs hold.

What Are the Most Common Mexican Address Mistakes to Avoid?

Almost every failed or delayed Mexico delivery traces back to one of a short list of formatting errors:

• Omitting the colonia entirely. Without it, a sorter has no way to disambiguate which neighborhood within a shared postal code the parcel belongs to.
• Guessing the postal code instead of verifying it against the colonia. A mismatched colonia/postal-code pair is one of the most common causes of misrouted Mexican mail.
• Putting the postal code on its own final line the way US or Canadian addresses do, instead of on the colonia line where Mexican sorting expects it.
• Confusing “número exterior” and “número interior.” The exterior number identifies the building; the interior number (apartment, office, or floor) needs its own “Int.” label — merging them into one number causes apartment-level misdeliveries.
• Forgetting “MEXICO” on mail sent from abroad. Without the country line, a US carrier can’t route the parcel internationally.
• Treating Mexico City’s boroughs as regular municipios. Mexico City uses “alcaldía” (formerly “delegación”) for its 16 boroughs — write the borough name, not a generic “Ciudad de México” alone, on the municipality line.

How Do You Handle Mexico City Boroughs, Interior Numbers, and Rural Addresses?

A few Mexico-specific cases trip up international senders:

• Mexico City (CDMX) uses 16 alcaldías (boroughs) — such as Cuauhtémoc, Miguel Hidalgo, and Coyoacán — in place of the municipios used in the 31 states. The alcaldía name goes on the municipality line, with “Ciudad de México” as the state.
• Interior numbers (número interior) for apartments, suites, or floors are written separately from the exterior street number, typically as “Int. 3” or “Depto. 3,” directly after the exterior number on the street line.
• Rural and smaller-town addresses may lack a formal street-and-number system and instead reference a well-known local landmark (“domicilio conocido”) alongside the colonia and postal code — these still route correctly as long as the postal code and colonia are accurate.
• State names are written in full, not abbreviated, on Mexican mail — there is no widely standardized 2-letter postal abbreviation for Mexican states the way there is for the US or Canada.

Frequently Asked Questions

What is a colonia and why does it matter for a Mexican address?

A colonia is a named neighborhood or settlement, and it’s a genuine routing unit in the Mexican postal system, not a decorative detail. Because a single 5-digit postal code can cover several colonias in dense urban areas, leaving the colonia off — or guessing it — is one of the most common causes of misdelivery.

Where does the postal code go in a Mexican address?

On the same line as the colonia, not on its own final line. A typical layout is “Col. Roma Norte, C.P. 06700” directly beneath the street line, with the municipality/borough and state on the line after that.

Do I add “Mexico” when shipping from the US?

Yes — always, as the last line. USPS and UPS sort outbound parcels by the destination country first. Without “MEXICO” or “MÉXICO,” the parcel can be held domestically or returned before it ever leaves the US.

What do the digits in a Mexican postal code mean?

The first two digits identify the state (or, within Mexico City, the borough); the last three narrow the code down to a specific municipality, colonia, or in some cases a single large-volume address. That structure lets an experienced handler sanity-check the rest of the address at a glance.

Is there a standard state abbreviation for Mexican addresses?

No — unlike the US or Canada, Mexico does not use a standardized 2-letter postal abbreviation for its 31 states plus Mexico City. The state name is spelled out in full on the final address line.

Sources

• Servicio Postal Mexicano (SEPOMEX) — gob.mx
• SEPOMEX — Manual de Asignación de Códigos Postales y Estandarización de Domicilios Postales
• Universal Postal Union — Mexico Postcode Addressing Reference
• Postal codes in Mexico — structure and format

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Part of our Shipping to Mexico guide. Related: International Shipping hub · UK Address Format.