US Counties Population API

This API provides detailed population statistics for US counties, including current and previous population data.

The US Counties Population API specializes in delivering comprehensive population data for counties across the United States. It processes a variety of data fields, including county names, corresponding states, and population figures for the current year (2024) and previous year (2020). The API utilizes standard JSON format for data exchange, ensuring compatibility with various applications and systems.

API Documentation

Endpoints


This endpoint allows users to retrieve the list of US states.


                                                                            
POST https://zylalabs.com/api/6183/us+counties+population+api/8604/us+states+list
                                                                            
                                                                        

Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {"states":["California","Illinois","Texas","Arizona","Florida","New York","Nevada","Washington","Michigan","Massachusetts","Pennsylvania","North Carolina","Virginia","Georgia","Maryland","New Jersey","Ohio","Wisconsin","Colorado","South Carolina","Tennessee","Alabama","Connecticut","Oregon","Indiana","Missouri","Minnesota","New Mexico","South Dakota","Idaho","Arkansas","Kentucky","Maine","Montana","Nebraska","New Hampshire","Rhode Island","Delaware","Wyoming","Hawaii","Mississippi","Vermont","West Virginia","Utah","Kansas","Iowa","North Dakota","Alaska","Louisiana","Virginia"]}
                                                                                                                                                                                                                    
                                                                                                    

Us states list - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/6183/us+counties+population+api/8604/us+states+list' --header 'Authorization: Bearer YOUR_API_KEY' --header 'Content-Type: application/json' --data-raw '{}'


This endpoint provides users with a list of counties for a specific US state. To use it, you must indicate a US state as a parameter. You can get them from the first endpoint.


                                                                            
POST https://zylalabs.com/api/6183/us+counties+population+api/8605/get+counties+by+state
                                                                            
                                                                        

Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {"state":"California","counties":["Los Angeles County","San Diego County","Orange County","Riverside County","San Bernardino County","Santa Clara County","Alameda County","Sacramento County","Fresno County","Ventura County","San Francisco County","San Joaquin County","Contra Costa County","Kern County","Tulare County","Monterey County","Sonoma County","Santa Barbara County","Butte County","Napa County","Placer County","El Dorado County","Imperial County","Marin County","Siskiyou County","Tehama County","Trinity County","Humboldt County","Del Norte County","Mendocino County","Lake County","Colusa County","Glenn County","Yuba County","Sutter County","Nevada County","Plumas County","Lassen County","Modoc County","Inyo County","Mono County","Alpine County"]}
                                                                                                                                                                                                                    
                                                                                                    

Get counties by state - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/6183/us+counties+population+api/8605/get+counties+by+state' --header 'Authorization: Bearer YOUR_API_KEY' --header 'Content-Type: application/json' --data-raw '{"state":"Required"}'


This endpoint provides the current population of a specific county. To use it, you must indicate a county as a parameter. You can get them from the second endpoint.


                                                                            
POST https://zylalabs.com/api/6183/us+counties+population+api/8606/get+current+population+by+county
                                                                            
                                                                        

Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {"county":"Tulare County","state":"California","current_population":481052}
                                                                                                                                                                                                                    
                                                                                                    

Get current population by county - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/6183/us+counties+population+api/8606/get+current+population+by+county' --header 'Authorization: Bearer YOUR_API_KEY' --header 'Content-Type: application/json' --data-raw '{"county":"Required"}'


This endpoint provides the previous population (2020) of a specific county. To use it, you must indicate a county as a parameter. You can get them from the second endpoint.


                                                                            
POST https://zylalabs.com/api/6183/us+counties+population+api/8607/get+previous+population+by+county
                                                                            
                                                                        

Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {"state":"California","county":"Tulare County","previous_population":473914}
                                                                                                                                                                                                                    
                                                                                                    

Get previous population by county - CODE SNIPPETS


curl --location --request POST 'https://zylalabs.com/api/6183/us+counties+population+api/8607/get+previous+population+by+county' --header 'Authorization: Bearer YOUR_API_KEY' --header 'Content-Type: application/json' --data-raw '{"county":"Required"}'


API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the US Counties Population API REST API, simply include your bearer token in the Authorization header.
Headers
Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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US Counties Population API FAQs

The US Counties Population API provides detailed population statistics for US counties, including current population data for the year 2024 and previous population data for the year 2020.

The API delivers data in standard JSON format, ensuring compatibility with various applications and systems.

To access population data for a specific county, you can make a request to the API endpoint with the county name and state as parameters, and it will return the relevant population statistics.

Yes, the API provides population data for both the current year (2024) and the previous year (2020), allowing users to perform historical population analysis.

Each endpoint returns specific population-related data. The "us states list" endpoint returns a list of US states. The "get counties by state" endpoint returns counties for a specified state. The "get current population by county" endpoint provides the current population for a specified county, while the "get previous population by county" endpoint returns the population from 2020 for that county.

Key fields in the response data include "state" and "counties" for the counties endpoint, "county," "state," and "current_population" for the current population endpoint, and "county," "state," and "previous_population" for the previous population endpoint. These fields provide essential information for identifying and analyzing population statistics.

The response data is organized in JSON format, with each endpoint returning a structured object. For example, the current population endpoint returns an object containing the county name, state, and current population value, making it easy to parse and utilize in applications.

The "get counties by state," "get current population by county," and "get previous population by county" endpoints require specific parameters. Users must provide the state name for the counties endpoint and the county name for the population endpoints to retrieve the relevant data.

The "us states list" endpoint provides a comprehensive list of US states. The "get counties by state" endpoint offers a list of counties within a specified state. The population endpoints provide current and previous population figures for specified counties, allowing users to analyze demographic changes over time.

Users can customize their data requests by specifying the desired state or county in the API call. For example, to get counties in California, users would call the "get counties by state" endpoint with "California" as a parameter. Similarly, they can specify a county to retrieve its current or previous population.

Typical use cases include demographic analysis, urban planning, resource allocation, and academic research. Users can leverage the data to understand population trends, compare county populations, and assess changes over time, which is valuable for policymakers and researchers.

Data accuracy is maintained through regular updates and validation against reliable sources, such as census data and government reports. The API aims to provide accurate and up-to-date population statistics, ensuring users can trust the information for analysis and decision-making.

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