| City: | Palm City, Florida |
| County: | Martin County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:44:04 PM |
| Population: | No Population Data |
| Area Code: | 772 |
| Classification: | PO Box |
| Coordinates: | 27.2298, -80.2978 |
| Quick Link: |
ZIP code 34991 serves as a business mail hub in Palm City, Florida. This ZIP doesn't correspond to a residential area. Instead, it's a point location within the larger Palm City community (served by ZIP 34990).
The Palm City post office maintains 511 PO Boxes and handles mail for 434 business delivery points. With 15 business establishments employing 76 workers, this ZIP supports commercial activity along SW Martin Highway. All 110 street delivery records share the same address: SW Martin Highway with unit designators, suggesting a business park or commercial center configuration.
This isn't a PO Box Only Zone. Street delivery exists throughout the surrounding Palm City area via the standard ZIP 34990. The PO Box classification here simply means this specific 5-digit code contains only PO Boxes and business delivery points, not residential carrier routes. Residents and businesses in the broader Palm City community can choose between PO Box service at 34991 or street delivery through neighboring ZIP codes.
For PO Box mail:
PO Box [number]
Palm City, FL 34991
For business units:
[Unit number] SW Martin Hwy
Palm City, FL 34991
Single street location with unit designators suggests business park or commercial center.
ZIP Code 34991 supports both business and residential activity. According to the Business Census (2024), there are 17 business establishments, employing about 82 people with an annual payroll of $2,973,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 4,202Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 17Source: CBP |
| 1st Quarter Payroll: | $717,000Source: CBP |
| Annual Payroll: | $2,973,000Source: CBP |
| # of Employees: | 82Source: CBP |
ZIP Code 34991 is located in Martin County, Florida, within the Port St. Lucie, FL Metropolitan Statistical Area (CBSA 38940) and Florida's 21st Congressional District. This Metro area has a population of 424,107 people, about 0.00% of whom live in ZIP Code 34991. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Port St. Lucie, FLSource: Census |
| CBSA Number: | 38940Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 424,107Source: Census |
| MSA: | Fort Pierce-Port St. Lucie, FL MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 21Source: USPS |
| Congressional Land Area: | 260.97 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1254175Source: Census |
| Place Name: | Palm City CDP; FloridaSource: Census |
We could not locate which school district 34991 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 March 1, 2026.