Route 334 is a Connecticut state highway in the Naugatuck River valley, running from Seymour to Ansonia.

As it approaches the Seymour-Derby town line, it turns northeast past the Fountain Lake Reservoir and briefly along the Seymour-Ansonia turn line before crossing into Ansonia.

In Ansonia, it intersects Route 8 and turns south and southeast, crossing the Naugatuck River before ending at an intersection with Route 115 near the Ansonia railroad station.

[1] As part of the 1962 Route Reclassification Act, Great Hill Road in Ansonia and Seymour was taken over by the state and designated as SR 734.

SR 735 was reconfigured to instead follow Franklin Street towards downtown Ansonia instead.