There are 2 Post Offices in Caldwell, New Jersey, serving a population of 8,032 people in an area of 2 square miles. There is 1 Post Office per 4,016 people, and 1 Post Office per square mile.
In New Jersey, Caldwell is ranked 367th of 893 cities in Post Offices per capita, and 213rd of 893 cities in Post Offices per square mile.
Find addresses, phone numbers, fax numbers, hours & services for Caldwell Post Offices.
United States Postal Service 10 Park Avenue Caldwell, NJ Mailing Service, Postal Services
United States Postal Service 155 Clinton Road Caldwell, NJ Mailing Service, Postal Services