High packet loss rate and limited bandwidth are two features that present the biggest challenges in successful design of multimedia wireless networks. A scalable congestion control algorithm for wireless networks (SCCW) is proposed in this paper. The technique has excellent scalability when a large number of flows are used, and when random and congestion losses coexist in a wireless network. Simulation results show that SCCW has better performance than additive increase multiplicative decrease (AIMD) algorithm, square root calculations (SQRT) algorithm, and inverse increase additive decrease (IIAD) algorithm.