The hamlet is also home to Long Island MacArthur Airport, which is owned and operated by the Town of Islip.

"[3] Since 1988, Ronkonkoma has been the end of electrification along the Long Island Rail Road's Main Line.

[5] Ronkonkoma was the terminus of the first road in the United States designed exclusively for automobiles, the Vanderbilt Motor Parkway, constructed by a consortium of investors called the Long Island Motor Parkway, Inc. led by William Kissam Vanderbilt II.

[12] Northrop Grumman has a hypersonic test and manufacturing facility adjacent to the Long Island MacArthur Airport.

The CDP area also extends into Central Islip Union Free School District to the west,[7][14] but that portion is taken up entirely by parts of the Connetquot River State Park.