Disclosed are flexible printed circuits incorporated into marine geophysical streamers. An embodiment discloses an apparatus comprising: a streamer; and a flexible printed circuit located in the streamer. Another embodiment discloses an apparatus comprising: a jacket; a strength member extending along a length of the jacket and disposed inside the jacket; geophysical sensors disposed inside the jacket; spacers disposed at spaced apart locations along the jacket; and a flexible printed circuit assembly extending along a length of the jacket. Another embodiment discloses a method comprising: towing at least one streamer in a body of water, wherein the at least one streamer comprises a flexible printed circuit.