| City: | Uniondale, New York |
| Names to Avoid: | Citibank |
| County: | Nassau County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 4:01:49 PM |
| Population: | No Population Data |
| Area Codes: | 363 / 516 / 718 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 40.7004, -73.5934 |
| Quick Link: |
Citibank, one of America's oldest financial institutions with roots dating to 1812, maintains dedicated ZIP code 11555 in Nassau County. Originally established as the City Bank of New York, the institution became Citibank in 1976 and is now part of Citigroup, formed through the 1998 merger with Travelers Group. This Uniondale facility handles banking correspondence for the Long Island region. The unique postal designation has served this location for over two decades.
Postal records show 8 ZIP+4 delivery codes, indicating a focused mail operation. Census County Business Patterns reports 12 establishments employing 298 workers. No residential population exists in this ZIP, consistent with its commercial function. Uniondale serves as the valid mailing city within New York's 4th Congressional District.
| Establishments: | 12 |
| Employment: | 298 |
ZIP Code 11555 supports both business and residential activity. According to the Business Census (2023), there are 11 business establishments, employing about 449 people with an annual payroll of $53,898,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 2,022Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 11Source: CBP |
| 1st Quarter Payroll: | $16,169,000Source: CBP |
| Annual Payroll: | $53,898,000Source: CBP |
| # of Employees: | 449Source: CBP |
ZIP Code 11555 is located in Nassau County, New York, within the New York-Newark-Jersey City, NY-NJ Metropolitan Statistical Area (CBSA 35620) and New York's 4th Congressional District. This Metro area has a population of 19,756,722 people, about 0.00% of whom live in ZIP Code 11555, and is subdivided into the Nassau County-Suffolk County, NY division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | New York-Newark-Jersey City, NY-NJSource: Census |
| CBSA Number: | 35620Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Nassau County-Suffolk County, NY (CBSA Div 35004)Source: Census |
| CBSA Population: | 19,756,722Source: Census |
| MSA: | New York-Northern New Jersey-Long Island, NY-NJ-CT-PASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 04Source: USPS |
| Congressional Land Area: | 110.85 sq miSource: Census |
| PMSA: | Nassau-Suffolk, NY PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 3676089Source: Census |
| Place Name: | Uniondale CDP; New YorkSource: Census |
We could not locate which school district 11555 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on January 1, 2026.