3 Free Ways to Delete Duplicate Contacts in Outlook | 2025

3 Ways to Kill Duplicate Contacts in Different Outlook Versions

There are two manual methods to delete duplicate contacts one for one-by-one deletion and another for multiple deletions at once, follow the methods below:

Method 1: Delete Contacts One by One

• Open Outlook and look for the People.
• After that in the Current View option, click on Views box>>Phone then you can find all the duplicates here.
• In the contact list, press the Ctrl button and then select the duplicate contacts one by one.
• Press Delete after selecting all duplicates.

Method 2: Use Export and Import Method to Delete Duplicate Contacts

• Open Outlook and go for the People.
• On the current Contacts folder, right-click and then select New Folder and Rename it.
• Go back to the folder Contacts, & to choose all contacts press (Ctrl+A).
• Now, to move contacts to the New folder, Press the shortcut key Ctrt+Shift+V>>Move to Folder and then choose new folder. (You can use drag and drop also.)
• Go to File>> Open & Export>>Import/Export.

Note: To Delete Duplicate contacts in Outlook 2010, click File >> Open >> Export and move directly to step 8.

• Choose Export to a File >> Comma Separated Values and then select the same new folder which is created earlier.
• Finally, save the file to the desired location and then click Finish.

Import Back the Duplicate Contacts to Outlook

• Go to File >> Open >> Import and choose Comma Separated Values.
• Browse the new folder that was created earlier.
• Select the option Do not import duplicate items.
• Select the primary Contacts folder for the destination, which is empty and click on the ‘Finish‘.
• Now comes the final step to delete duplicate contacts in the Outlook mailbox:

After doing all the above steps, copy all the contacts from the new folder which is created to store duplicates, to the main Contacts folder. Now, if you ever get duplicate contacts again, then a pop-up will show up with two options:

• Select Add new contact if the contact isn’t a duplicate.
• Select Update information of selected contact if the contact is a duplicate.
• Choose the required option according to your needs.
• Now, click Update>>Update All to make the same option for all duplicate contacts.
• After backing up all the contacts delete the New Folder that you have created to store the duplicate contacts.

Method 3: Use Outlook Contacts Duplicate Remover

Try a professional utility to delete duplicate contacts and other items from MS Outlook. Outlook Duplicate Remover provided by Sysinfo is the best option for such type of problem. This tool is able to delete duplicate Outlook emails, contacts, and calendars from PST Files. The tool entirely removes all duplicates from the source PST file and helps in reducing PST file corruption.

• Download the Outlook Duplicate Remover.
• Add the Outlook PST File that has duplicate contacts.
• Then mark the Folders in the Tree-Structure Preview having contacts.
• Choose Contacts in the Remove Duplicate Option.
• Finally, define the path and click on the Convert button.

Your PST file will be saved at the defined location without having any duplicate contacts. This software can remove duplicates from all types of PST files created on Outlook 2010, 2013, 2016, 2019, or any other Outlook versions.

Conclusion

We have suggested some manual as well as professional methods to delete duplicate contacts in Outlook 2010, 2013, and 2016. If you choose the manual solution it requires some extra effort but choose the professional method there is no need for technical knowledge and takes very little time, to perform the actions. It’s all up to you which one you choose.

About The Author:

Simran Bhatia

Simran Bhatia is a technical content writer engaged in writing clear, concise, and SEO-optimized content. With a background in computer science and a passion for writing, I thrive to deliver complex technical content in simple layman terms.