Albertson is a hamlet and census-designated place (CDP) in the Town of North Hempstead in Nassau County, on Long Island, in New York, United States. The population was 5,220 at the time of the 2020 census.

The first European settler was John Seren who came from Connecticut in 1644. Later Townsend Albertson started a farm and gristmill and the community became known as Albertson.

In 1850, a road was built through Albertson on the lands of Isaac Underhill Willets. The road is still known as I.U. Willets Road. (Willets complained that Long Island has more roads than it would ever need). The Long Island Rail Road opened an Albertson train station in 1864.

In 1908, the Long Island Motor Parkway was built on the southern border of Albertson. In 1938, it was closed, and in 1940, it was replaced by the Northern State Parkway, which runs along the northern border of Albertson.

In 1946, suburbanization began with a small development by William Levitt. The last farms were developed in the mid-1960s.

The Searingtown School (now in Albertson) was one of the schools involved in the landmark Supreme Court case Engel v. Vitale (1962), which disallowed government-directed prayers in public schools.

According to the United States Census Bureau, the CDP has a total area of 0.7 square miles (1.8 km), all land.

Albertson is located south & west of Roslyn Heights, east of Searingtown, and north of Williston Park.

Historical population

Census	Pop.	Note	%±
2020	5,220		—
U.S. Decennial Census

As of the census of 2010, there were 5,182 people, 1,812 households, and 1,442 families residing in the CDP. The population density was 7,866.8 inhabitants per square mile (3,037.4/km). There were 1,853 housing units at an average density of 2,803.3 per square mile (1,082.4/km). The racial makeup of the CDP was 70.4% White, 24.3% Asian, 0.3% African American, 0.02% Native American, 1.27% from other races, and 1.83% from two or more races. Hispanic or Latino of any race were 5.50% of the population.

There were 1,812 households, out of which 33.6% had children under the age of 18 living with them, 67.7% were married couples living together, 8.4% had a female householder with no husband present, and 20.4% were non-families. 17.9% of all households were made up of individuals, and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.87 and the average family size was 3.27.

In the CDP, the population was spread out, with 22.5% under the age of 18, 6.4% from 18 to 24, 27.1% from 25 to 44, 24.6% from 45 to 64, and 19.4% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 93.7 males. For every 100 females age 18 and over, there were 90.8 males.

The median income for a household in the CDP was $66,516, and the median income for a family was $77,516. Males had a median income of $55,000 versus $44,792 for females. The per capita income for the CDP was $31,222. About 4.5% of families and 4.7% of the population were below the poverty line, including 5.4% of those under age 18 and 5.5% of those age 65 or over.

• Albertson Triangle
• John D. Caemmerer Park
• Reflection Park

As Albertson is an unincorporated hamlet, it has no government of its own, and is instead governed directly by the Town of North Hempstead in Manhasset.

Albertson is located within the Town of North Hempstead's 2nd council district, which as of January 2024 is represented on the North Hempstead Town Council by Edward Scott (R–Albertson).

Albertson is located in Nassau County's 18th Legislative district, which as of August 2024 is represented in the Nassau County Legislature by Samantha A. Goetz (R–Locust Valley).

Albertson is split between the New York State Assembly's 16th and 19th State Assembly districts, which as of September 2022 are represented by Gina Sillitti (D–Manorhaven) and Edward Ra (R–Garden City South), respectively.

Albertson is located in the New York State Senate's 7th State Senate district, which as of January 2024 is represented in the New York State Senate by Jack M. Martins (R–Mineola).

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

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

Politically, Albertson is almost evenly split. In the 2008 presidential election Democrat Barack Obama won 51% of the vote to Republican John McCain's 48%.

Albertson is located within the boundaries of (and is thus served by) the Mineola Union Free School District, the East Williston Union Free School District, the Herricks Union Free School District, and the Roslyn Union Free School District. As such, children who reside within the hamlet and attend public schools will go to school in one of these four school districts depending on where they live within the hamlet.

Albertson is located within the boundaries of (and is thus served by) Roslyn's library district (the Bryant Library) and the Shelter Rock Library District. The area of the hamlet located served by the Roslyn Union Free School District is served by the Bryant Library, and the areas of the hamlet served by the Mineola and Herricks Union Free School Districts are served by the Shelter Rock Public Library.

The Northern State Parkway forms the hamlet's northern border with Roslyn Heights. Other major roads which pass through the hamlet include I.U. Willets Road and Willis Avenue.

Additionally, the Long Island Motor Parkway used to run through the hamlet.

Albertson is served by the Albertson station on the Long Island Rail Road's Oyster Bay Branch.

Roslyn Estates is served by the n23 bus route, which is operated by Nassau Inter-County Express (NICE). This bus route travels along Willis Avenue through the hamlet, following the route of the former New York & North Shore Traction Company's trolley route between Mineola and Roslyn, which ran through the area in the early 20th century.

National Grid USA provides natural gas to homes and businesses that are hooked up to natural gas lines in Albertson.

PSEG Long Island provides power to all homes and businesses within Albertson.

Albertson in its entirety is connected to the Nassau County Sewage District's sanitary sewer network.

Albertson is primarily located within the boundaries of the Albertson Water District. However, smaller portions are served by the Garden City Park Water District, the Roslyn Water District, and the Village of Williston Park's water system.

• Danny Masterson – Convicted rapist and former actor; grew up in Albertson.
• Rick Pasqualone – American actor and voice actor.

• Albertson Fire Company