Yahoo Search is a search engine owned and operated by Yahoo, using Microsoft Bing to generate results.

When first released in 1994, Yahoo Search sent queries to a searchable index of pages supplemented with its directory of websites. Web crawling and data housing was executed by Google from 2000 until 2004, when Yahoo created its own crawler.

In July 2009, Yahoo and Microsoft made a deal in which Bing would generate Yahoo Search results. Google provided some results from 2015 to 2018.^{[failed verification]}

As of August 2025, Yahoo had a search market share in the U.S. of 3.22 percent.

Yahoo Search began as a tool to search Yahoo! Directory, which was launched in 1994 by Jerry Yang and David Filo, then students at Stanford University. It became the first popular search engine on the Web, despite being manually curated, unlike its competitors. In 2000, Yahoo Search began licensing results from Google Search. Seeking to provide its own search engine results, in December 2002 Yahoo announced it would acquire search engine company Inktomi. The acquisition completed in March 2003.

In October 2003, Yahoo purchased Overture Services, Inc., which included the AlltheWeb and AltaVista search engines. In February 2004, Yahoo Search replaced Google's results with results from its own web crawler, Yahoo Search Technology. Yahoo Search Technology combined the capabilities of search engine companies Yahoo had acquired. The next month, the site began practicing paid inclusion to guarantee listing in search; however, most results continued to come from free web crawling.

In 2005, Yahoo Search results began including links to previous versions of pages archived on the Wayback Machine.

Yahoo released Panama, its updated sponsored search platform, in 2007. The platform introduced ad matching based on a mix of bid prices, ad quality, and relevance to the user. Also in 2007, Yahoo released OneSearch, its Internet search system for mobile phones. Yahoo used Novarra's mobile content transcoding service for OneSearch.