Males　have　been　proposed　to　be　more　vulnerable　to　internet　addiction　(IA)　than　females.　However,　males　and　females　may　differ　with　respect　to　specific　patterns　and　types　of　internet　usage　and　related　IA.　To　investigate　further,　a　meta-analysis　was　conducted　to　investigate　gender-related　differences　in　internet　gaming　disorder　(IGD)　and　social　media　addiction　(SMA).　The　current　meta-analysis　aimed　to　quantify　gender-related　effect　sizes　relating　to　IGD　and　SMA,　examine　potential　moderating　influences　of　regions　and　other　possible　confounds,　and　compare　the　findings　with　generalized　IA　at　the　country　level.　The　meta-analysis　comprised　53　effect　sizes　with　82,440　individuals　from　21　countries/regions　for　IGD,　and　41　effect　sizes　with　58,336　individuals　from　22　countries/regions　for　SMA.　A　random-effects　model　confirmed　important　gender-specific　distinctions　as　men　were　more　likely　to　exhibit　IGD　than　women　(g　=　0.479)　and　less　likely　to　exhibit　SMA　than　women　(g　=　−0.202).　Additional　moderator　analyses　revealed　that　effect　sizes　of　IGD　and　SMA　were　larger　in　Europe　and　the　Americas　than　in　Asia.　Further　analyses　indicated　that　the　effect　sizes　of　gender-related　differences　in　IGD　and　SMA　at　the　country-level　were　significantly　larger　than　those　in　generalized　IA,　which　suggests　that　gender-related　differences　in　specific　IAs　may　be　underestimated　in　the　＇umbrella＇　of　generalized　IA.　Results　have　implications　for　explaining　why　males　and　females　may　become　addicted　to　internet　use　through　different　pathways.　©　2020　Elsevier　Ltd