By 1850 it was moved to the Dr. E. F. Peck General Store on the northwest corner of what is today Ocean Avenue and Lakeland Street.

[12] On the Map of The Village of Hermannville, Town of Islip, Suffolk County, Long Island, Hemannville station is shown as being at the intersection of the Main Line and Herman Avenue, which today is part of the Ronkonkoma Yard.

In February 2024, the Federal Aviation Administration approved the Town of Islip's plan to erect a new airport terminal on the north side of MacArthur Airport, adjacent to the south side of the Ronkonkoma LIRR station; the project is to be constructed as part of the Midway Crossing project.

[19][20] In January 2025, Suffolk County Executive Edward Romaine, along with Amtrak officials, officially announced that a new Long Island branch of Amtrak's Northeast Regional would serve – and terminate at – the Ronkonkoma station, with intermediate stops at Jamaica and Hicksville east of Penn Station.

Required infrastructure upgrades for the service would likely include an additional platform and track at Ronkonkoma.

Suffolk County Executive Ed Romaine said that Amtrak wanted the extension, in part, due to Ronkonkoma's location next to Long Island MacArthur Airport.

[22] As this is the eastern end of the electrified portion of the Main Line, the yard stores the LIRR's electric multiple unit train sets that are used on the Ronkonkoma Branch.

[22] The expansion used space already owned by the MTA located immediately to the south of the existing rail yard and north of MacArthur Airport.

The Deer Park option was dismissed as it would have impacted several grade crossings, duplicated employee facilities and as it would not have benefited riders east of the station.

[27] A construction award was finally made in December 2017, and the completion date was pushed back to late 2020.