Append Missing County Data

Doesn't the ZIP Indicate the County?

Contrary to popular belief, ZIP Codes are not shapes. They are lines or routes travelled by mail carriers. They are allocated, changed, and even retired according to the needs dictated by efficient mail delivery. This means that ZIP Codes do not line up with municipal boundaries like those of a city, county, or even a state! There are even some ZIPs that cross as many as six counties!

How Can I Determine the County?

The only way to properly determine in which county a particular address is found is to perform address standardization and verification using our LiveAddress API. Once the address has been properly pinpointed and verified by our API, the county is then assigned and returned.

Why Do I Need the County Information?

There are many reasons for wanting to determine the county of a particular address. Among them:

  • Proper assignment of voting districts.
  • Correct calculation of sales tax.
  • Demographic profiling using MSA (CBSA) analysis.
  • Regulatory compliance, e.g. medical or insurance-related compliance.

Find it in these products:

LiveAddress: Web-based Address Verification API for Developers