As of October 15, 2026, ListRiver's records show 5,216 active registered businesses in Mamaroneck, New York. 55% are LLCs. 18 were formed in September 2026.
How many businesses are registered in Mamaroneck, New York?
ListRiver has 5,216 active registered businesses in Mamaroneck, New York on record as of October 15, 2026, from official New York business registry data. Dissolved and defunct businesses are not counted.
How many new businesses were formed in Mamaroneck, New York in September 2026?
18 businesses on record in Mamaroneck, New York were formed in September 2026.
How many new businesses opened in Mamaroneck, New York in the last 12 months?
229 businesses on record in Mamaroneck, New York were formed in the 12 months through September 2026.
What is the most common type of business in Mamaroneck, New York?
LLCs are the most common: 2,881 of 5,216 businesses on record (55%), followed by Corporations with 2,166 (42%).
Where does this data come from?
From New York's official business registry. ListRiver loads each new state file, standardizes it, removes duplicates and updates its database weekly. Email and industry details are added from SMBCredit.net where available.
How do I get a list of businesses in Mamaroneck, New York?
Use ListRiver's list builder to filter Mamaroneck, New York businesses by entity type, formation date, industry and contact details, see the exact count and price, and download a CSV. Every list includes monthly refresh files.
Free to use on any site, and it updates itself every month. Copy this code and paste it into your page. Preview the chart.
Counts come from official New York business registry records on file with ListRiver, current as of October 15, 2026. They include businesses that are active on the state register; dissolved and defunct entities are excluded. Contact details are added from SMBCredit.net where available. Formation months reflect the registration date the state reports. See the methodology for sources, update schedules and known limits.