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​City of Thornton Sex Offender Information

Appointment and Fees

  • New registrations and re-registrations are by appointment only on Tuesdays from 8:00am-4:30pm. No walk-in's will be accepted. Please click here to schedule your appointment online or call 720-977-5030.

  • When you arrive for your appointment, please check in at the Records Department in the lobby of the Thornton Police Department (9551 Civic Center Drive, Thornton, CO 80229) to begin your paperwork.

    • In accordance with 16-22-108 C.R.S., the City of Thornton collects fees from the person required to register as a sex offender. Effective immediately, the following fees will be required:

      • New Registration or Re-activation - $75 (Offenders who have not ever registered in Thornton or previously resided in the City of Thornton and are returning to Thornton).

      • Quarterly and Yearly registrations - $25

      • Address Changes - No Charge

      • De-registrations - No Charge

Cash or card are accepted and a photo ID is required. (A current driver's license, state-issued ID card, military ID and passport are acceptable forms of ID). If you are a new register, you must also bring proof of residency, including a copy of your lease or a handwritten and signed note from your landlord or the property owner. If you are unable to pay the fee at the time you register, you must still complete your sex offender registration by the required date. 

IMPORTANT: Penalties for failure to comply with mandatory sex offender registration are substantial. In most cases, violation of the registration requirement constitutes a separate offense.