The area where Roslyn Estates is located was originally inhabited by the Matinecock Native Americans.

[2] European colonists started to settle in the area in the 17th century – specifically settlers of Dutch and English heritage.

[6] It was nicknamed "The Eden of Long Island" when originally developed, due to the community's design and setting.

[9] In 1931, residents decided to try incorporating Roslyn Estates as a village, due to the fact that the community's original deed restrictions were set to expire around that time.

[4] In the mid-1950s, a 27-acre (11 ha) housing development, known as Homes in Roslyn Estates, was constructed in the village, and sponsored by builders Edward Fineberg and Arthur Bandes and consisting of 60 ranch and split-level homes designed by architect Stanley J.

[11] It was designed by John A. Grammas on land given to the village by the firm of Saul Sokolov, Inc., which had developed that section of Roslyn Estates several years prior.

[12] By having the district boundaries redrawn to include the village, Roslyn Estates residents would have the ability to be guaranteed a parking space at the Manhasset station for commuting to/from Manhattan.

[4] According to the United States Census Bureau, the village has a total area of 0.4 square miles (1.0 km2), all land.

[17][18][19] According to the United States Environmental Protection Agency and the United States Geological Survey, the highest point in Roslyn Estates is located between The Pines and The Hemlocks, at 287 feet (87 m), and the lowest point is located near The Locusts, at approximately 170 feet (52 m).

[32][33][34] The exceptions are the former Roslyn Estates Sales Office and former Highland Elementary School towards the southeastern edge of the village; these buildings are now a restaurant and house of worship, respectively.

[45][43][47] Additionally, a private tennis club, the Tennis King, is located adjacent to Village Hall at the southern edge of the village, and Christopher Morley Park forms part of the border between Roslyn Estates and North Hills.

[45][48] As of May 2023, the Mayor of Roslyn Estates is Paul Leone Peters, and the Trustees are Brett Auerbach, Brian Feingold, Stephen Fox, and Susan Rubinstein.

[34] The following is a list of Roslyn Estates' mayors, from 1931 to present:[34][50] Roslyn Estates is located entirely within the Town of North Hempstead's 6th council district, which as of March 2024 is represented on the North Hempstead Town Council by Mariann Dalimonte (D–Port Washington).

[32][33][56] Roslyn Estates is located in 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).

[32][33][57] Like the rest of New York, Roslyn Estates is represented in the United States Senate by Charles E. Schumer (D) and Kirsten Gillibrand (D).

[58] In the 2024 U.S. presidential election, the majority of Roslyn Estates voters voted for Kamala D. Harris (D).

[32][33][63] Additionally, the Village of Roslyn Estates owns and maintains roughly 7.8 miles (12.6 km) of roads.

[64][65][66] Roslyn Estates features a winding and organic street layout, which meanders and can be unpredictable.

[12][13][32] Roslyn Estates is served by the n20X, n20H, n21, and n23 bus routes, which are operated by Nassau Inter-County Express (NICE).

[32][33][74] The southern part of Roslyn Estates is within the Nassau County Sewage District, and roughly 60-70 lots were hooked up to it as of 2013.

[74] This village-owned district includes roughly 25 homes and flows into Nassau County's system.