Caleb (^{[pronunciation?]}; כָּלֵב, Kalev; Tiberian vocalization: Kālēḇ; Hebrew Academy: Kalev) is a male given name. A character called Caleb is named in the Bible. A reference to him may also be found in the Quran, although his name is not mentioned.

When the Hebrews came to the outskirts of Canaan, the land that had been promised to them by God, after having fled slavery in Egypt, Moses (the Hebrew leader) sent twelve spies (Hebrew: מרגלים‎, meraglim) into Canaan to report on what was there—one spy representing each of the Twelve Tribes. Ten of the spies returned to say that the land would be impossible to claim, and that giants lived there who would crush the Hebrew army. Only two, Joshua (from the tribe of Ephraim) and Caleb (representing Judah), returned and said that God would be able to deliver Canaan into the hands of the Hebrew nation.

The Bible records that, because of the testimony of ten of the spies, the Hebrews chose not to enter Canaan. For this disobedience, God caused them to wander in the desert for forty years before being allowed to enter Canaan and conquer it as their home. The only adult Israelites allowed to survive these forty years and enter Canaan were Joshua and Caleb (son of Jephunneh), as a reward for their faith in God. This is recorded in the Book of Numbers. Caleb is called "my servant" by God in Numbers 14:24, a position of the highest honor heretofore used only for Moses. Caleb, son of Jephunneh,first mentioned in the above account (Numbers 13:6) is not to be confused with another Caleb, great-grandson of Judah through Tamar( 1 Chronicles 2:3-9). This other Caleb was the son of Hezron, and his wife was Azubah (I Chronicles 2:18,19).