LinkedIn Groups bring together millions of professionals around shared interests including technology, marketing, entrepreneurship and career development.

DanD.ai analysed more than 100 of the largest LinkedIn Groups, each with hundreds of thousands or millions of members, to understand which topics attract the largest professional communities.

Category analysis

Technology & AI

Technology communities dominate LinkedIn Groups, covering topics such as artificial intelligence, cloud computing, programming and cybersecurity.

Examples include:

• Artificial Intelligence Exchange

• Python Developers Community

• Cloud Computing

• Java Developers Community

Marketing, Media & Communications

Marketing is another major LinkedIn community theme, bringing together digital marketers, SEO specialists and brand strategists.

Examples include:

• Digital Marketing

• Social Media Marketing Group

• Marketing Communication

• Marketing Club

HR, Talent & Workplace

Human resources communities focus on recruitment, talent development and workplace strategy.

Examples include:

• Linked:HR

• Human Resources (HR) Professionals

• Human Resources (HR) & Talent Management Executive

Data, Analytics & Business Intelligence

Data science and analytics groups connect professionals working with big data, machine learning and business intelligence tools.

Examples include:

• Data Science Community

• Big Data and Analytics

• Analytics / Data Science / AI Career

• Power BI: Business Intelligence Dashboards, Analysis for Analysts & Chief Operating Officers

Business, Leadership & Entrepreneurship

These groups connect founders, executives and entrepreneurs discussing leadership, startups and strategy.

Examples include:

• Harvard Business Review Discussion Group

• Leadership Think Tank

• On Startups - The Community For Entrepreneurs

• Lean Six Sigma

  FAQ’s

  What are the most popular LinkedIn Group topics?

  Analysis of more than 100 large LinkedIn Groups shows that the most common topics include technology and artificial intelligence, marketing, data science, entrepreneurship, and human resources.

  Many of the largest professional communities focus on emerging technology, career development and digital marketing.

  You can explore the full dataset on the Largest LinkedIn Groups page.

  What is the largest LinkedIn Group?

  The largest LinkedIn Groups have millions of members, bringing together professionals from around the world to share insights, advice and industry news.

  You can explore the current rankings on the Largest LinkedIn Groups (2026) page.

  Are LinkedIn Groups still active?

  Yes. While LinkedIn Groups are less visible than other features on the platform, many communities remain highly active and continue to grow.

  Large groups focused on technology, marketing, entrepreneurship and data science still attract thousands of professionals sharing knowledge and opportunities.

  How many LinkedIn Groups have over one million members?

  Research by DanD.ai has identified more than 40 LinkedIn Groups with over one million members, with many others approaching the milestone.

  These groups represent some of the largest professional communities on the internet.

  Are Facebook Groups larger than LinkedIn Groups?

  In general, Facebook Groups tend to grow much larger than LinkedIn Groups because they cover a wider range of social topics.

  DanD.ai has identified more than 300 Facebook Groups with over one million members, including communities focused on humour, food, home improvement and faith.

  You can explore the full analysis on the Largest Facebook Groups page.

  What topics dominate large online communities?

  Across both Facebook and LinkedIn, the largest communities tend to form around a few core themes:

  • technology and artificial intelligence

  • marketing and media

  • careers and professional networking

  • humour and entertainment

  • food and lifestyle

  You can explore how these themes appear on Facebook in the Most Popular Facebook Group Topics analysis.

  Additional Datasets

• Largest LinkedIn Groups

• Largest Facebook Groups in the World

• Largest Facebook Christian Groups

• Largest Facebook Food Groups

• Largest Facebook Meme Groups