夏圭（约1180年－约1230年前后），又作夏珪，字禹玉，为南宋著名画家，钱塘（今浙江杭州）人。

宋宁宗时（1195—1224）官至画院中最高职等的待诏，并赐金带。早年工人物画，后以山水画着称，取法李唐，画山石时用水墨皴染，用秃笔带水作大斧劈皴，称为“拖泥带水皴”。笔简意足，清旷俏丽，善于提炼剪裁，景色含蓄动人，清幽深远。所画山水取景多为“半边”、“一角”之景，构图别具一格，有“夏半边”之称。是北派山水代表人物之一。

夏圭画法和马远也相近，后人把他与马远并称“马夏”，两人著名于空间留白构图，「马一角、夏半边」实为引导观赏者之方向。马、夏二人加上李唐、刘松年，被合称为“南宋四家”。 夏圭的儿子夏森，也擅长作画。

Xia Gui (Chinese:夏圭 or 夏珪; Wade–Giles:Hsia Kui; fl. 1195–1224), courtesy name Yuyu (禹玉), was a Chinese landscape painter of the Song dynasty. Very little is known about his life, and only a few of his works survive, but he is generally considered one of China's greatest artists. He continued the tradition of Li Tang, further simplifying the earlier Song style to achieve a more immediate, striking effect. Together with Ma Yuan, he founded the so-called Ma-Xia (馬夏) school, one of the most important of the period.