Joseph Raymond McCarthy ɗan siyasan Amurka ne wanda ya yi aiki a matsayin ɗan majalisar dattawan Amurka na jam'iyyar Republican daga jihar Wisconsin daga 1947 har zuwa mutuwarsa a 1957. Ya shahara da rigima da bincikensa na zargin 'yan gurguzu da 'yan leƙen asirin Soviet a gwamnatin Amurka da masana'antar nishaɗi. a cikin shekarun 1950, lokacin da aka sani da "zamanin McCarthy." Kalmar "McCarthyism" yanzu ana amfani da ita don bayyana al'adar yin zarge-zarge na zalunci ko cin amanar kasa ba tare da la'akari da hujja ba.