| City: | Corpus Christi, Texas |
| City Alias: | Corp Christi |
| County: | Nueces County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 9:49:14 AM |
| Population: | No Population Data |
| Area Code: | 361 |
| Classification: | PO Box |
| Coordinates: | 27.8006, -97.3964 |
| Quick Link: |
The single street route on N Tancahua St handles 130 delivery points with apartment and business units. Most downtown residents and businesses use the standard 78401 ZIP for street addresses, while 78403 provides the PO Box alternative. The facility sits in the Central City and Downtown Corpus Christi neighborhoods, serving the urban core's postal needs.
The single street route on N Tancahua St reflects this ZIP's role as a downtown PO Box facility rather than a traditional carrier delivery zone.
ZIP Code 78403 supports both business and residential activity. According to the Business Census (2024), there are 16 business establishments, employing about 1,314 people with an annual payroll of $189,635,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 470Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 16Source: CBP |
| 1st Quarter Payroll: | $50,507,000Source: CBP |
| Annual Payroll: | $189,635,000Source: CBP |
| # of Employees: | 1,314Source: CBP |
ZIP Code 78403 is located in Nueces County, Texas, within the Corpus Christi, TX Metropolitan Statistical Area (CBSA 18580) and Texas's 27th Congressional District. This Metro area has a population of 428,185 people, about 0.00% of whom live in ZIP Code 78403. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Corpus Christi, TXSource: Census |
| CBSA Number: | 18580Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 428,185Source: Census |
| MSA: | Corpus Christi, TX MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 27Source: USPS |
| Congressional Land Area: | 9128.25 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4817000Source: Census |
| Place Name: | Corpus Christi city; TexasSource: Census |
We could not locate which school district 78403 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 February 1, 2026.