The International Railway Company (IRC) was a transportation company formed in a 1902 merger between several Buffalo-area interurban and street railways. The city railways that merged were the West Side Street Railway, the Crosstown Street Railway and the Buffalo Traction Company. The suburban railroads that merged included the Buffalo & Niagara Electric Street Railway, and its subsidiary the Buffalo, Lockport & Olcott Beach Railway; the Buffalo, Depew & Lancaster Railway; and the Niagara Falls Park & River Railway. Later the IRC acquired the Niagara Gorge Railroad (NGRR) as a subsidiary, which was sold in 1924 to the Niagara Falls Power Company. The NGRR also leased the Lewiston & Youngstown Frontier Railroad.

The IRC maintained streetcar networks throughout Western New York: in Buffalo, Niagara Falls and Lockport, and a single line in Niagara Falls, Ontario.Partially owing to the decline of the streetcar system, the IRC declared bankruptcy in 1947 and transferred its assets to the newly formed Niagara Frontier Transit System (later the Niagara Frontier Transportation Authority), shutting down the streetcar network in 1950. The City of Buffalo would not see rapid transit rail again until 1984 when the Buffalo Metro Rail began operation under the NFTA.