Understanding the processing times for various immigration applications at the Saint Louis MO Field Office can be crucial for those seeking to adjust their status, apply for naturalization, or obtain recognition of U.S. citizenship. In this article, we’ll discuss the roles of the Field Office, average processing times, factors influencing those times, and tips for navigating the process.

All the processing data in this blog is directly from the USCIS Case Processing Times website. We manually check the data every month to ensure accuracy.


The USCIS Saint Louis MO Field Office is an essential part of the U.S. immigration process. They handle immigration applications including I-485 Employment-based adjustment and Family-based adjustment applications, N-400 Application for Naturalization, and N-600 Application for recognition of U.S. citizenship. It’s critical for applicants to understand processing times, so they can plan their lives and manage expectations.

The Process at the Saint Louis MO Field Office

Various stages take place once an applicant submits their application to USCIS. They include:

  1. Application receipt and review
  2. Security and background checks
  3. Scheduling appointments for biometrics and interviews
  4. Adjudication and decision-making

Throughout this process, applicants may receive updates and requests for further information from the USCIS.

Average Processing Times

Processing times at the Saint Louis MO Field Office can vary depending on the type of application submitted. As of the most recent data, the average processing times are:

FormCategoryOffice80% of cases are completed within
I-485Employment-based adjustment applicationsSaint Louis MO Field Office12 Months
I-485Family-based adjustment applicationsSaint Louis MO Field Office12 Months
N-400Application for NaturalizationSaint Louis MO Field Office13.5 Months
N-600Application for recognition of U.S. citizenshipSaint Louis MO Field Office4 Months

These times may change, so it’s essential to keep yourself updated by visiting the USCIS Case Processing Times website.

Factors Influencing Processing Times

Several factors can influence processing times at USCIS Field Offices, including:

  • USCIS workload and staffing at a specific field office
  • Complexity of individual cases
  • Required security and background checks
  • Response time from applicants to respond to USCIS requests, such as RFE
  • Government processing priorities

These factors can uniquely affect application processing times at the Saint Louis MO Field Office.

How to Navigate the Process

Applicants must stay proactive and be organized to ensure smooth processing of their applications. Some helpful tips include:

  • Accurately complete and submit the necessary forms, such as the I-485 application, N-400 application, or N-600 application
  • Respond promptly to any requests for additional information
  • Check USCIS processing times regularly for updates
  • Sign up for case status updates from USCIS
  • Consult an immigration attorney if you are unsure about any aspect of the process.

In some cases, individuals may consider filing a Writ of Mandamus to push USCIS to make a decision on a case that has been pending for an unusually long time.


Understanding USCIS Saint Louis MO Field Office processing times can significantly impact your immigration journey. Keep informed about processing times, be organized, and stay proactive in managing your application. If you have experiences or questions about navigating the immigration process at the Saint Louis MO Field Office, please feel free to share in the comments below.

Continue Reading

Continue Reading

Free Case Evaluation

Fill out the form below to receive a free and confidential initial consultation.