Historic Yaphank, Where the Past Greets the Present.
"Yaphank is very nearly the geographical center of Long Island and is the outgrowth of one of the divisions of Brookhaven town lands made in 1739. As the little village lies on the east side of Long Islands Connecticut River (corrupted from the Unkechaug Indian dialect of the Algonquin word quonnetukqut meaning a long, tidal river or creek), several waterpowered woolen, grist and sawmills were established there in Colonial times and the village became known as Millville. Sometime about 1844, when the railroad was put through the village, the name was changed to Yaphank, taking the Indian name of a small creek which lies about 3 miles directly south, in Yamphanke Neck, now South Haven." - Osborn Shaw, Brookhaven Town Historian, 1947