Facebook does not provide a way to sort all Facebook groups by size. However, below is a list of the 18 largest Facebook groups in 2020.
Facebook groups are a great way to build a community around a product, cause, or idea. Many businesses have been built by leveraging large Facebook groups.
List of 18 of the biggest Facebook groups:
| Facebook Group | Members | Public or Private |
| Our Evergreen Bangladesh | 6,324,077 | Public |
| Instant Pot Community | 2,734,067 | Public |
| OFFICIALLY FAME 🐰 | 2,407,435 | Private |
| View from my window | 2,343,188 | Public |
| Banting 7 Day Meal Plans | 2,291,493 | Private |
| Awww My Dear Crush | 2,104,574 | Private |
| Why So Serious | 2,034,167 | Private |
| Keto & Low Carb Recipes for Beginners | 1,991,881 | Private |
| A group where we all pretend to be ants in an ant colony | 1,911,520 | Private |
| DIY On A Budget Official | 1,896,045 | Private |
| Weird Secondhand Finds That Just Need To Be Shared | 1,865,105 | Public |
| Dogspotting | 1,751,728 | Public |
| Keto For Beginners | 1,705,455 | Private |
| Australian Made Products | 1,668,013 | Public |
| COMPTEUR OFFICIEL DE GILETS JAUNES | 1,663,003 | Public |
| Rant HQ | 1,390,324 | Private |
| Instant Pot Recipes Only | 1,236,594 | Private |
| FAMILY LOCKDOWN TIPS & IDEAS | 1,147,303 | Private |
| Karachi Karachi Hai ❤Once Again❤ | 1,075,858 | Private |
| Girls LOVE Travel® | 1,075,806 | Private |
To view this list of the largest Facebook groups in a Google Sheet, click here: https://docs.google.com/spreadsheets/d/1Tjwg7PefHU6PlfhkF8t7S7VKzOHbH5NxVW2zty0ASCE/edit?usp=sharing
If you know of any other large Facebook groups that should be on the list, let us know in the comments.