CT-1

CT-1, CT1 and CT 1 can refer to:
 * ČT1, a television channel in the Czech Republic
 * CT1, a cordless telephone standard
 * Cosina CT-1, a 35mm film SLR camera
 * Connecticut's 1st congressional district
 * Connecticut Route 1
 * U.S. Route 1 in Connecticut
 * Cardiotrophin 1
 * Core Tier 1 Capital