[10] Located off of Warner Avenue, it was built in part with funding from Title 608 of the Federal Housing Administration and was the first major rental housing development built in the New York area under Title 608's then-new provisions.

[8][12][13] Its construction required the demolition of the original Bryant Library, which subsequently operated out of temporary locations until relocating to its current home – the Roslyn War Memorial Building – in 1952.

[8][12][15][16] The former Rubel estate in the village was developed as the Roslyn Pines subdivision in the 1950s, consisting of roughly 102 homes.

[17] The Ellen E. Ward Memorial Clock Tower in Roslyn was designed by Lamb and Rich, and was completed in 1895.

[21] According to the United States Environmental Protection Agency and the United States Geological Survey, the highest point in Roslyn is located near Piper Court, at approximately 253 feet (77 m), and the lowest point is Hempstead Harbor, which is at sea level.

[35][42][43] Roslyn is located entirely within New York's 7th State Senate district, which as of March 2024 is represented by Jack M. Martins (R–Old Westbury).

[35][44] Roslyn is located entirely within New York's 3rd Congressional district, which as of March 2024 is represented in the United States Congress by Thomas R. Suozzi (D–Glen Cove).

[35][45] Like the rest of New York, Roslyn is represented in the United States Senate by Charles E. Schumer (D) and Kirsten Gillibrand (D).

[35] The William Cullen Bryant Viaduct (carrying New York State Route 25A) passes through – and serves as a bypass of – Roslyn.

[8][12][35] Prior to the opening of the Bryant Viaduct, NY 25A traveled through the heart of the village's downtown (along Old Northern Boulevard) and was notorious for its traffic jams in the area.

[35] Roslyn is served by six Nassau Inter-County Express bus routes: the n20H, the n20X, the n21, the n23, the n40X, and the Port Washington Shuttle.

[51][52] PSEG Long Island provides power to all homes and businesses within Roslyn.

[35][54] The sewage from the Village's sewer system is pumped to and is treated by the Nassau County Sewage District's Cedar Creek Wastewater Treatment Plant via the East Hills Interceptor line, which connects the village's system with Nassau County's and the treatment plant on the South Shore.

[25][55][56][57] Prior to having the sanitary waste treated by Nassau County's facilities, the village's sewer system expelled the sanitary sewage locally into Hempstead Harbor, contributing to water pollution problems.