Co-locatedcollaborativeWebsearchisasurprisingly commonactivity,despitethefactthatWebbrowsers andsearchenginesarenotdesignedtosupport collaboration.Wereportthefindingsoftwostudies(a diarystudyandanobservationalstudy)thatprovide insightsregardingthefrequencyofco-located collaborativesearching,thestrategiesparticipantsuse, andtheprosandconsofthesestrategies.Wethen articulatedesignimplicationsfornext-generationtools thatcouldenhancetheexperienceofco-located collaborativesearch. ACMClassificationKeywords H5.3[Informationinterfacesandpresentation]:Group andOrganizationInterfaces-Computer-supported cooperativework. GeneralTerms Design,Experimentation Keywords Collaborativesearch,Websearch,searchinterfaces.