The Cape Codder was a pair of day and night passenger trains run by the New York, New Haven and Hartford Railroad (NH) from the latter 1920s to the mid 1960s, with some brief interruptions.

[2] A section serving Woods Hole, with a New England Steamship Company connection for Martha's Vineyard, was added for the 1926 season.

Both branches of the Cape Codder plus the Harpooner operated as a single train, with New Bedford the primary connecting point for steamships.

[8] In 1937, the NH inaugurated the Day Cape Codder which would travel daily from New York City to the Woods Hole and the Hyannis branches.

The NH at this time ran additional daytime trains operating only on Fridays, Cape Cod bound, and Sundays, westbound, the Islander and Neptune.

[9][10][11] Several lightly-used stations including Middleborough, Onset, Gray Gables, West Falmouth, Sagamore, and Barnstable were dropped in the 1930s and 1940s, while Attleboro was added.