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The United States Post Office building in Larchmont, New York was constructed in 1937 as part of a program started in 1853 by the Office of the Supervising Architect of the United States Treasury Department. It is in the Colonial Revival style, which was the most popular style for post offices built in New York after World War I. This post office was listed on the National Register of Historic Places as part of a Multiple Property Submission. Approximately 80 buildings within the Multiple Property Submission fit into this style.During the 1932-1942 era of post office construction, a large number of post offices and other federal buildings were built in New York. This surge was intended both to address the long-term need for new government facilities, as well as to employ out-of-work architects, engineers, artists, and other construction industry workers who were unemployed as a result of the Great Depression. The economic climate made it necessary to focus on functional design and a restraint in the amount of ornamentation used. The post office was designed by consulting architect William Dewey Foster. The federal Works Projects Administration Federal Art Project (WPA/FAP) also commissioned two realistic murals depicting Larchmont scenes from that era. The murals, painted by the accomplished New York landscape artist, Thomas H. Donnelly, were unveiled in 1939 and depict the Larchmont Manor House and Larchmont Yacht Club.

Chatsworth Avenue School is a public elementary school located in Larchmont, New York. It was founded in 1902, as a two-room schoolhouse on Chatsworth Avenue. It has 3 floors and 4 extra classes that the kids partake in several times a week: Music, Library, Gym, and Art. With its two cafeterias and three playgrounds, children always enjoy their 1-hour lunch break. School hours are from 8:40 AM to 3:00 PM. There are approximately five classes per grade, and around 22 kids per class. The current principal is Katie Anderson, who was formerly vice principal. It is a K-5 school with students advancing to the Hommocks Middle School. It is one of four elementary schools of the Mamaroneck Union Free School District. In the mid 1970s, it was cited as an example of a school that was endeared by the community which was considering closing schools in the face of declining enrollment.In 1998, a 4th grade teacher from the school with 31 years of experience was interviewed by the New York Times and explained why the state mandated English Language Arts test was not suitable for the grade level.In 1999, the school was one of the top 25 schools in New York State for Percentage of 6th graders scoring at highest level in reading test.In 2000 the school was involved in a controversy when an 11-year-old student was suspended in a nationally reported incident over alleged sexual harassment of a girl. The child's parents claimed that it was an over reaction by the school. However, due to federal privacy regulations, the school could not respond publicly regarding details of the incident. In the face of a threatened lawsuit and media pressure, the school was forced to back down. Many other parents sided with the school, saying there had been many incidents with the child and that the cited incident was simply the straw that broke the camel's back. The overall perception was that the child's parents used lawyers and the media to manipulate the situation to their advantage.

The Mamaroneck Union Free School District is the school district created to serve the public education needs of Larchmont and Mamaroneck, New York. It serves the Town of Mamaroneck, the Village of Larchmont and the part of the Village of Mamaroneck that is within the Town of Mamaroneck. The part of the Village of Mamaroneck within the Town of Rye is served by the Rye Neck Union Free School District. The school district comprises four elementary schools serving grades K-5: Central School Chatsworth Avenue School Mamaroneck Avenue School Murray Avenue SchoolThere is one middle school serving grades 6-8: Hommocks Middle SchoolAnd one high school serving grades 9-12: Mamaroneck High SchoolThe district offices are in the High School.

The Church of St. Augustine is a Roman Catholic church located in Larchmont, New York. The parish having been founded in 1892, the present Gothic Revival church building was constructed in 1928.

Mamaroneck High School is a public school located in Mamaroneck, New York. The school is part of the Mamaroneck Union Free School District. Students residing in neighboring Larchmont also attend this school.

Walter's Hot Dog Stand is a National Register of Historic Places designated landmark located in Mamaroneck in Westchester County, New York.

Larchmont Yacht Club is a private, members-only yacht club situated on Larchmont Harbor in the Village of Larchmont, in Westchester County, New York.

Larchmont is an affluent village located within the Town of Mamaroneck in Westchester County, New York, approximately 18 miles (29 km) northeast of Midtown Manhattan. The population of the village was 5,864 at the 2010 census. In February 2019, Bloomberg ranked Larchmont as the 15th wealthiest place in the United States, and the third wealthiest in New York.

Mamaroneck Harbor is the name of a bay located in the village of Mamaroneck on the Long Island Sound, in Westchester County, New York. It is open to southerly winds but affords shelter against northerly winds for vessels drawing less than 10. The depth in the outer harbor is from 7 to 12 feet at low tide. Mamaroneck River is a shallow, and a stream or tidal inlet. The rocks in Mamaroneck Harbor rise abruptly, and some of them are bare at low tide.

Larchmont Harbor is the name of a bay located on the north shore of Long Island Sound, in the village of Larchmont in Westchester County, New York.Larchmont Harbor lies between Long Beach Point and Umbrella Point, and northward of Execution Rocks lighthouse. The harbor is the home of the Larchmont Yacht Club. The depths at the anchorage for small vessels in the harbor range from about 12 feet in the entrance to 6 feet near the shore. The harbor is full of mooring buoys for small yachts during the summer season. The entrance Of Larchmont Harbor is on either side of Hen and Chickens, a reef bare at low tide in places near the middle. The easterly entrance is about 300 yards wide

Larchmont station is a commuter rail stop on the Metro-North Railroad's New Haven Line, located in Larchmont, New York.

Manor Park is a park in the village of Larchmont, New York. It consists of about 13 acres (53,000 m2) of land (with a shoreline of more than 5,000 feet (1,500 m)) that lies along the Long Island Sound and Larchmont Harbor. It is well known for its striated rocks, gazebos, scenic views and walking pathways. The history of Manor Park goes back to 1614 when a Dutch ship captain "reported seeing campfires" belonging to the Siwanoy Indians in the area that now comprises the park. Within a century, British and Dutch settlers had purchased much of the land. In 1661, John Richbell, a wealthy trader purchased "three necks" of land from "Chiefs Wappaquewam and Manhattan" with the "middle neck" consisting the land comprising Larchmont and Manor Park. Samuel Palmer purchased the "middle neck" in 1701. Afterwards he and his family resided in the area until 1790 when most of the land was purchased by Peter Jay Munro, a nephew of John Jay, one of the "Founding Fathers" and the first Chief Justice of the U.S. Supreme Court. Subsequent to Munro’s ownership, Thomas J.S. Flint purchased the property comprising Manor Park and much of the Village of Larchmont and established the Larchmont Manor Company with plans of "developing the [area] into a suburban community..." During the 1870s, he reserved 6 acres (24,000 m2) of waterfront land and named it Larchmont Manor Park, which became the heart of today’s park. Afterwards, the Larchmont Manor Park Society was established in 1892 to "maintain, preserve and protect the park" which also includes "nearby Fountain Square and four small traffic islands" and Manor Beach. The Society’s latest endeavors included a successful $1 million capital improvement campaign in 2003 to provide for seawall reinforcement and repairs, path curbing and repairs, landscaping, replacement of an old chain-link fence, and rebuilding of the west gazebo and a permanent endowment fund as well as an art show "Manor Park—In All Seasons" in May 2004. Although Manor Park is privately owned, it is open to the public from dawn to dusk.During Hurricane Sandy in 2012, much of the sea way was destroyed by storm surges, and a small part of the park was eroded into the water.