How to get the AWS Region where Node.js Lambda Function is running

To get the AWS Region where your Lambda Function is running we need to access the Environment Variable AWS_REGION.

To access the environment variable AWS_REGION using Node.js Lambda Function we can use process.env.AWS_REGION.

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Example of Node.js Lambda Function getting the Runtime Region

I launched a Lambda Function in Mumbai (ap-south-1) region and used the following javascript code.

exports.handler = async (event) => {
    
    const region_code = process.env.AWS_REGION;
    
    console.log(region_code);
};

Output

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If you want to learn more on how to get Environment Variables in Node.js Lambda Functions visit my article about it here.

I hope this helps.