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