The postal code for Ahuachapán (the municipality and main town in the Ahuachapán department of El Salvador) is 2101 under the traditional 4‑digit system, and 02101 under the newer 5‑digit format that many local sources now list.

What code to use

  • Old/traditional : 2101
  • New format (with leading 0) : 02101

Both are commonly seen. If you’re filling in an online form or international shipping label, it’s safest to:

  • Use 2101 if the field expects 4 digits.
  • Use 02101 if it allows or expects 5 digits.

How this relates to the map

On maps and postal code maps of El Salvador, Ahuachapán municipality is shown with the code 2101 (sometimes labeled 02101) covering the city center and surrounding suburbs like Altamira, San José, San Francisco, and others. Other nearby municipalities in the department use different codes (e.g., Apaneca 2102/02102, Atiquizaya 2103/02103, etc.), so the map will show a band of codes around 2101–2118 in the Ahuachapán department.

Addressing example

A typical local address might look like:

text

Juan Pérez
Calle Principal 123
Ahuachapán
2101
EL SALVADOR

or with the 5‑digit version:

text

Juan Pérez
Calle Principal 123
Ahuachapán
02101
EL SALVADOR

Information gathered from public forums or data available on the internet and portrayed here.