Boulder County government offices are closed Monday, May 27, in observance of Memorial Day.

Appointments now required for in-person visits. Additionally, registration renewals need to be completed out of office. Options include online, by mail or drop box, or at a self-service kiosk. Read about these changes (including benefits, and FAQs). Información en español.

Renew by Mail

To renew your vehicle registration by mail, please send the following to Motor Vehicle Division, 1750 33rd Street, Suite 100, Boulder, CO 80301:

  • Postcard renewal notice
  • Proof of insurance if it is noted on your postcard renewal notice. ALL motor vehicle types MUST have insurance to be driven on Colorado highways.
  • Your new physical and mailing addresses if they have changed.
  • Proof of emissions if it is noted on your postcard renewal notice. To apply for an Emissions Waiver or Out-of-State Emissions Extension, visit
  • Payment by check for the amount shown on your renewal postcard. Checks should be made payable to the Boulder County Clerk.
  • Renewals must be received by the last day of the grace period (one month after the expiration month).

Contact Us

Motor Vehicle Division

7:30 a.m. to 5 p.m.
Closed Fridays
Online Motor Vehicle Contact Us Form
Contáctenos - Formulario en línea

Phone: 303-413-7710
Fax: 303-413-7706


Boulder: 1750 33rd St.
Map and Directions Boulder Location

Longmont: 529 Coffman St.
Map and Directions Longmont Location

Lafayette: 1755 S. Public Road
Map and Directions Lafayette Location

Mailing Address

1750 33rd St., Suite 100
Boulder, CO 80301