凯尔特十字（爱尔兰语：cros Cheilteach， 苏格兰盖尔语：crois Cheilteach，马恩岛语：crosh Cheltiagh，威尔斯语：croes Geltaidd，康沃尔语：krows keltek，布列塔尼语：kroaz geltek）是一个中央交叉处连接着一个圆环的十字之符号。在早期，凯尔特十字通常是指一种立在立方体基座上被称为high cross的石碑，石碑中的圆环是被用强化四肢连接的工具。早期的high cross拥有一个宽广而朴素的正面，并且刻上了许多动物的图案；而到了晚些的时候，其表面则被刻上了诗歌里的题词。

Celtic cross (Irish:cros Cheilteach, Scottish Gaelic:crois Cheilteach, Manx:crosh Cheltiagh, Welsh:croes Geltaidd, Cornish:krows keltek, Breton:kroaz geltek) is a symbol that combines a cross with a ring surrounding the intersection; the cross' stem being longer than the other threes' intersection. It belongs to a wider group of crosses with a nimbus. The Celtic Christians combined the Christian cross with the nimbus to create high crosses – a free-standing cross made of stone which was often richly decorated. The Celtic Revival shape, usually decorated with interlace and other motifs from Insular art, became popular for funerary monuments and other uses, and has remained so, spreading well beyond Ireland.