刺猬索尼克（日语：ソニック・ザ・ヘッジホッグ，英语：Sonic the Hedgehog，）是由中裕司创作，世嘉开发并持有的电子游戏系列。系列核心是一系列竞速式平台游戏，但亦有数个其他类型的衍生作品。系列主角是拟人的蓝色刺猬索尼克，他平静的生活多被系列主要反派蛋头博士打破。索尼克通常必须阻止蛋头并挫败他各种统治世界的计划。系列首部游戏于1991年发行，在世嘉要求制作一个吉祥物角色后由公司索尼克团队部门构思；作品获得成功并发展出续作，之后转变为世嘉公司在16位时代（1990年代中期）的主打游戏。

索尼克团队此后开发了系列中的多部作品。最初团队的知名成员有中裕司、设计师大岛直人和游戏企划安原弘和。其他索尼克游戏开发者由美国世嘉技术开发研究所、日本Dimps、美国Backbone Entertainment、加拿大BioWare、英国Sumo Digital和英国Traveller's Tales。虽然系列首部游戏是平台游戏，但后来延伸到动作冒险、格斗、竞速、角色扮演以及体育类型。

Sonic the Hedgehog(Japanese:ソニック・ザ・ヘッジホッグ,Hepburn:Sonikku za Hejjihoggu) is a video game franchise created and owned by Sega. The franchise centers on a series of speed-based platform games, but several are spin-offs in different genres. The protagonist of the series is an anthropomorphic blue hedgehog named Sonic, whose peaceful life is often interrupted by the series's main antagonist, Doctor Eggman. Typically, Sonic—usually along with some of his friends, such as Tails, Amy, and Knuckles—must stop Eggman and foil any plans of world domination. The first game in the series, published in 1991, was conceived by Sega's Sonic Team division after Sega requested a mascot character; the title was a success and spawned sequels, and transformed Sega into a leading video game company during the 16-bit era in the early to mid-1990s.