Aggregator may refer to:

• Job ads aggregator, a website that aggregates job ads from various job boards, multiposter sites, as well as from direct employers and recruiting agencies
• News aggregator, software or a website that aggregates news or other content from various sources
• Poll aggregator, a website that aggregates polling data to gauge public sentiment on key political issues or to measure likely support for a candidate or party in an upcoming election.
• Review aggregator, a website that aggregates reviews of movies or other products or services
• Search aggregator, software that aggregates search results from various search engines
• Social network aggregation, the collection of content from multiple social network services
• Video aggregator, a website that aggregates online videos from various sources

• Aggregate (disambiguation)
• Aggregation (disambiguation)
• Category:Aggregation-based digital libraries, digital libraries that are primarily based on aggregation or harvesting of other digital libraries or repositories