Aerial surveys were conducted during 1993 in the Naknek-Kvichak, Egegik, Ugashik, Nushagak, and Togiak Districts of Bristol Bay, Alaska, to obtain indices of chinook, chum and sockeye salmon escapement and provide information on salmon distribution. Additionally, visual counts from towers were used to estimate sockeye salmon escapament into the Kvichak, Naknek, Egegik, Ugashik, Wood, Igushik, Wood and Togiak river systems, while sonar was used to estimate chinook, sockeye, chum, pink and coho salmon escapement into the Nushagak River drainage. Alagnak River aerial index counts totaled 347,975 sockeye, 10,170 chinook, and 4,600 chum salmon. Total sockeye salmon escapements estimated from tower counts for the Kvichak and Naknek Rivers were 4,025,166 and 1,535,658 respectively. Naknek River drainage aerial index counts for chinook salmon yielded a total of 8,016 spawners. Egegik District aerial index counts totaled 1,143 chinook, and 2,304 chum salmon. Total sockeye salmon escapement estimated from tower counts for the Egegik River was 1,516,980 fish, the eighth largest tower count on record for this system. Ugashik District aerial index counts totaled 23,920 sockeye (Dog Salmon and King Salmon Rivers), 4,586 chinook, and 10,985 chum salmon. The total sockeye escapement estimated from tower counts for the Ugashik River was 1,389,534 fish. Escapements of salmon into the Nushagak-Mulchatna River system estimated from sonar counts totaled 715,099 sockeye, 97,812 chinook, 217,230 chum, 0 pink, and 42,742 coho. Total sockeye salmon escapements estimated from tower counts in the Wood and Igushik Rivers totaled 1,176,126 and 405,564 fish, respectively. Total sockeye salmon escapement into the Togiak Lake system estimated from tower counts totaled 177,185, while aerial surveys of the mainstem Togiak River and its tributaries downstream of the tower yielded an additional escapement estimate of 15,930. The sockeye salmon escapement estimate from aerial counts of Kulukak Bay drainages totaled 31,800. Chinook and chum salmon escapements estimated from aerial surveys of the Togiak and Kulukak Rivers combined were estimated at 13,060 and 75,400 fish. Weather prevented aerial surveys during the peak of coho salmon spawning, coho salmon escapement could not be estimated.