Filmed in a small town in Connecticut known as Thompson. Which is located in the northeast corner of the state.
The paintings done by Alan Ladd's character were painted by Frank Stovall, as well as two of Carolyn Jones by Harold M. Kramer and others by Hilyard Brown.
Also filmed in Woodstock, CT at The Pink House. Woodstock, CT is also located in the Northeast corner of the state which is also known as The Quiet Corner.
The Hamilton's car is a 1953 Chevrolet Bel Air convertible.
Filming started 23 June. The Man in the Net (1959) was mostly shot in Hollywood at the Goldwyn Studios with some location shooting at Raceland in Framingham, Massachusetts. Many of the outdoor scenes were shot in Thompson, Connecticut, on the town common where a set was built (gas station) and at the Ballard Farm. Also, the exterior of "The Chimney House," a location that figures prominently in the story is Roseland Cottage in Woodstock, Connecticut.