Current USCIS processing times for cases handled at the Saint Louis MO office, from USCIS's published data (July 15, 2026). Half of cases finish within the first figure; nearly all (93%) finish within the second.
| Form | Case type | Half of cases within | Nearly all (93%) within |
|---|---|---|---|
| I-485 | Family-based adjustment applications | 10 months | 18.5 months |
| N-400 | Application for Naturalization | 11 months | 12.5 months |
| N-600 | Application for recognition of U.S. citizenship | 12 months | 21.5 months |
| N-600K | Application for Citizenship and Issuance of Certificate Under Section 322 | about 5.4 years | about 5.5 years |
Times vary with each case's facts and USCIS workloads, and they change monthly. These figures describe recent past cases, not a guarantee for any individual case.
Use the Processing Times tool to add your filing date and see a personalized estimate for your pending case, or explore the Department of Labor queues and the Visa Bulletin waiting line on the same page.