TTCP may refer to:

• ttcp, a computer utility program for measuring network throughput
• T/TCP, a variant of the TCP protocol
• The Technical Cooperation Program, an international organisation concerned with cooperation on defence science and technology matters
• The ICAO code for Arthur Napoleon Raymond Robinson International Airport (formerly Crown Point Airport) on the island of Tobago (TTCP - Trinidad & Tobago Crown Point)
• Tetracalciumphosphate Ca₄(PO₄)₂