Country, state, and city data can help developers build location-aware registration forms, checkout flows, and geographic dropdowns. When choosing a data source, consider how the data is structured and how your application will retrieve and use it.
Country, state, and city data can help developers build location-aware registration forms, checkout flows, and geographic dropdowns. When choosing a data source, consider how the data is structured and how your application will retrieve and use it.
How to get a list of states and cities for countries?
Choose a source that provides structured geographic reference data and makes its coverage clear. Avoid relying on unsupported assumptions about how many countries, administrative regions, cities, or postal codes a dataset contains; check the source documentation for the coverage relevant to your application.
Structured data can help you represent relationships between countries, states or provinces, and cities. A REST API or a dataset can be a suitable option depending on how your application needs to access the data.
Where to find administrative region data for developers?
Two common integration approaches are querying a hosted API or incorporating a dataset into your application.
Method A: Consuming a REST APIA hosted reference API lets your application request geographic data as needed. For example, a form can request states after a user selects a country. Country Data API provides endpoints for country, state, city, and postal or ZIP code data.
Method B: Using a datasetIf your application needs to keep a local copy of reference data, a dataset may be an option. The countries-states-cities database describes data available in formats including JSON, SQL, and CSV. Review the source and its update process before incorporating a dataset into your application.
How to structure country, state, and city dropdowns programmatically?
For hierarchical dropdowns, use the relationships in your data source to filter choices: selecting a country can determine which states or provinces to show, and selecting one of those can determine which cities to show. Check the source's documentation for the fields and codes it provides, and map those fields to your application's data model.
Rather than embedding a large reference dataset directly in a client application, consider retrieving the relevant data when it is needed. The right approach depends on your application's performance, availability, and data-management requirements.
What are practical ways to handle administrative divisions?
Load geographic data in a way that fits the form and dataset. For example, you can retrieve countries when the form loads, then request state or city options in response to a user's selections. For fields with many options, a searchable input or autocomplete can be easier to use than a long dropdown.
Review the documentation and the countries reference list to assess available data and integration patterns. Country Data API also supports address autocomplete and validation workflows.
Frequently asked questions
Why use an API instead of static JSON files for states and cities?
An API lets your application request reference data from a hosted service rather than maintaining a local copy. Check the API documentation for how data is provided and how to account for updates in your application.
How should I handle performance when loading large city lists?
Consider retrieving city options only when a user has selected the relevant country or state, or use a searchable input for fields with many choices. Test the approach with your data and application.
Where can I check pricing and plan information?
Visit the pricing page for plan information.
Sources
- Country, State & City REST API | Country Data API
- countries-states-cities-database | 🌍 Discover our global repository of countries, states, and cities! 🏙️ Get comprehensive data in JSON, SQL, PSQL, SQLSERVER, MONGODB, SQLITE, XML, YAML, and CSV for
This article was produced with the help of AI and reviewed for accuracy against the cited sources.
