In this tutorial, you will learn how to find duplicates in two columns in Google Sheets.
You can easily find duplicates in two columns in Google Sheets by using functions and formulas in Google Sheets.
Once ready, we’ll get started by utilizing real-world examples to show you how to find duplicates in two columns in Google Sheets.
How To Find Duplicates In Two Columns In Google Sheets
Quick Navigation
Before we start, you will need to get ready a set of data for us to work on.
Step 1
First, make sure your data is tidy and clean to easily follow the tutorial.

Step 2
To find duplicates in two columns in Google Sheets, you need to select the entire data group, then select ‘Format’, and press ‘Conditional formatting’.

Step 3
A pop-up box will appear on the right side of your screen. It is for you to customise how you want to format your data group to highlight certain criterias. To find duplicates in two columns, you will need to enter this formula, =COUNTIF($A$4:$B$7,A3)>1.

Step 4
Once you are done, your data will look like this.

Summary
That’s all there is to it. You are welcome to copy the example spreadsheet below to see how it is done. The most crucial lesson is to enjoy yourself while doing it.
Example Spreadsheet: Make a copy of the example spreadsheet
In this tutorial, I covered how to find duplicates in two columns in Google Sheets. Want more? Check out all the Google Sheets Tutorials.