A non-profit organization of Building Officials based in Whittier,CA which promulgates building codes and fire-safety codes. These codes, most notably the Uniform Building Code, are then adopted officially into law by various jurisdictions at the state, federal, and local levels.

ICBO (as it is more commonly known) is one of three major code-promulgating organizations (BOCA, SBCCI, and ICBO) in the United States which have joined together to form the International Code Council (ICC) which has released the new jointly-developed I-Codes in an attempt to unify building standards worldwide.