Coho salmon Oncorhynchus kisutch marked as juveniles with coded wire tags and adipose finclips in 1991 and 1992 were released into several freshwater systems of Northern Cook Inlet. Marked coho salmon were recovered in 1993 from commercial fisheries and escapements. Escapement samples were used to assess straying and the proportion of marked fish returning to each system. Commercial harvest data and recoveries of marked fish from the commercial harvest were used to estimate the harvest of stocked coho salmon from these systems in the Upper Cook Inlet commercial fisheries. During the dates of the catch sampling program a total of 117,924, 39,333, and 61,870 coho salmon were harvested from the Central District drift net fishery, Central District Upper Subdistricts (eastside) set net fishery, and Northern District set net fishery, respectively. Coho salmon from the hatchery stocking programs contributed an estimated 8,922 fish (7.6%) to the Central District drift net fishery, 1,783 fish (4.5%) to the Central District eastside set net fishery, and 6,180 (10%) to the Northern District set net fishery. Escapement counts of 382 coho salmon in Ship Creek and 2,376 coho salmon in Campbell Creek exceeded the biological escapement goal of 200 coho salmon in each stream. Estimates from the Statewide Harvest Survey show that effort and harvest increased in 1993 relative to the historic average at Campbell and Bird creeks, likely due to the return of stocked coho salmon, and remained at the same levels in Ship Creek. Recovery of 341 coho salmon with decodable tags from the escapement in Northern Cook Inlet streams indicated that hatchery-reared coho salmon did not stray into Campbell or Jim creeks or the Little Susitna River. Coho salmon stocked into Campbell Creek strayed into Ship Creek at a rate greater than 5%.