南里奥格兰德州（葡萄牙语：Rio Grande do Sul，发音：.mw-parser-output .IPA{font-family:"Charis SIL","Doulos SIL","Linux Libertine","Segoe UI","Lucida Sans Unicode","Code2000","Gentium","Gentium Alternative","TITUS Cyberbit Basic","Arial Unicode MS","IPAPANNEW","Chrysanthi Unicode","GentiumAlt","Bitstream Vera","Bitstream Cyberbit","Hiragino Kaku Gothic Pro","Lucida Grande",sans-serif;text-decoration:none!important}.mw-parser-output .IPA a:link,.mw-parser-output .IPA a:visited{text-decoration:none!important} 聆听）是巴西最南端的一个州，东临大西洋，首府阿雷格里港，人口10,963,216。该州与阿根廷、乌拉圭及圣卡塔琳娜州接壤。

南里奥格兰德州共下辖497个市镇，市镇数量为巴西各州中的第3名；阿雷格里港是南里约格朗德州首府及最大城市，人口超过140万人。