Jackfish is a ghost town in northern Ontario, Canada, located on the north shore of Lake Superior east of Terrace Bay.

The last spike on the Canadian Pacific Railway (CPR) track between Montreal and Winnipeg was driven in west of Jackfish on May 16, 1885. Laying one particular mile of railway in this area is said to have cost $700,000.

Jackfish was established as a train order station on the CPR following the period of railway construction between 1883 and 1885. Initially a siding or passing track was built at this location to allow east and westbound trains to operate on the single track main line. An electrical telegraph enabled the station operator to control the movement of trains with information received from a train dispatcher.

With its location as a railway siding, along a beach area, amongst Lake Superior's otherwise rocky shoreline, Jackfish became a port of commercial fishing. Fish were caught here and packed in ice and loaded aboard trains bound for markets in Toronto and Montreal.

In 1895 Jackfish was established as a port to receive coal required as fuel for steam trains travelling on the CPR. A dock outfitted with cranes allowed large ships to unload their cargo. From this point, the coal was loaded into cars and delivered to CPR coaling depots such as Schreiber and White River. With the increased activity of steam locomotives shunting cars around, a large water tower was located near the railway tracks.

In the 1930s A lumber company here sent logs by ship for use at pulp mills in the United States.

During World War II, young Canadian men of Japanese origin from British Columbia were sent to road construction camps, including one at Jackfish, to work on the construction of the Trans-Canada Highway.

With the dieselization of CPR's motive power and replacement of its steam engines in the 1950s, the fortunes of the town began to decline. The fish stocks also collapsed with the introduction of the sea lamprey into the Great Lakes.

The Lakeview Hotel at Jackfish, built at the end of the 19th century, remained a popular stopping place during the summer for a number of years. The hotel burned down in 1960. By September, 1963 two families remained in Jackfish and they moved out of the town a month later. Hence,the town site was totally abandoned by 1963.

"Jackfish" is a common name for the Northern Pike.