Webhow much do usps window clerk jobs pay per hour? The average hourly pay for a usps window clerk job in the us is $18. 35. Hourly salary range is $5. 29 to $25. 24. Webwe’ve identified nine states where the typical salary for an usps window clerk job is above the national average. Topping the list is washington, with delaware and virginia. The average usps window clerk base salary at us postal service is $46k per year. Webjun 6, 2024 · the average salary for an usps window clerk…