Pilot · Updated May 2026
How to Change Your Name in King County (2026 Cost + Fees)
The cost of a legal name change in King County is typically between $260–$360 for many petitioners, which includes a $208 court filing fee and $20 typical certified copy fee (per copy estimate), plus passport or DMV updates you select afterward.
| Court filing fee (estimate) | $208 |
| Certified copy fee (estimate) | $20 |
| Publication | Not modeled |
| Fingerprinting | Not modeled |
| Total modeled range | $260 – $360 |
| Processing time | ~5-8 weeks |
Fee verified stamp: 2026-05.
Reason-specific guides in Washington
Official resources
Return to the Washington statewide hub or open the calculator.