The　compressed　liquid　viscosities　of　ortho-xylene,　meta-xylene,　para-xylene　and　ethylbenzene　were　measured　using　a　vibrating-wire　viscometer　at　different　temperatures　and　pressures.　The　measurements　were　performed　over　the　temperature　ranges　of　(273　to　373)　K　for　o-xylene　and　m-xylene,　(293　to　373)　K　for　p-xylene　and　(253　to　373)　K　for　ethylbenzene,　at　pressures　from　(0.1　to　30)　MPa,　except　for　ethylbenzene　for　which　the　pressure　range　was　up　to　35　MPa.　The　combined　expanded　uncertainty　of　the　reported　viscosity　is　better　than　2%　with　a　confidence　level　of　0.95　(k　=　2).　The　experimental　data　were　correlated　with　the　empirical　Andrade-Tait　equation　which　reproduced　the　results　with　the　average　absolute　percentage　deviations　of　(0.25,　0.15,　0.16　and　0.23)%　for　o-xylene,　m-xylene,　p-xylene　and　ethylbenzene,　respectively.　The　present　results　are　in　good　agreement　with　most　of　the　literature　values.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.