ISO 3166-1 country lists merged with their UN Geoscheme regional codes in ready-to-use JSON, XML, CSV data sets

Countries - ISO-639, ISO-3166 countries codes with subdivisions and names, ISO-4217 currency designators, ITU-T E.164 IDD phone codes, countries capitals, UN M.49 codes, IANA ccTLD countries domains, FIPS, IOC/NOC and FIFA codes, VERY VERY FAST, compatible with Databases/JSON/BSON/GOB/XML/CSV, Emoji countries flags and currencies, Unicode CLDR.

⭐ PHP library providing ISO codes with localization: country (ISO 3166-1), subdivision (ISO 3166-2), language (ISO 639-3), currency (ISO 4217) and scripts (ISO 15924)

This is the best source for iso3166 codes you can found. I am sure.

An offline crossplatform .NET library for getting Global Country , iso3166 Short-code and Region Data

Complete ISO 3166 countries and subdivisions data

A lightweight Python package, and accompanying API, that can be used to access all of the world's most up-to-date and accurate ISO 3166-2 subdivision data, including: name, local name, code, parent code, type, latitude/longitude, flag and more.

Wikipedia web crawler to extract ISO-3166 countries and their subdivisions with ISO codes

A flask based microservice for ISO 3166-1 countries, ISO 3166-2 subdivisions, and cities.

Dutch translations of ISO codes

ISO 3166-2:CA Province Codes and Names

ISO 3166-2:MX State Codes and Names

Basic ISO-3166 code structs for Golang

This project includes ISO 3166 Country Codes, specifically codes for countries, codes for subdivisions, and formerly used codes.

A simple router and middleware for region endpoint redirection written in Go.

New GeoNames Data Package and Functions in R

ISO 3166-2 info for Python Projects.

ISO Standards