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Search for Sex Offenders

You can search for sex offenders living in your area and sign up to register for an alert when one moves into your neighborhood.

There are two ways to learn about registered sex offenders:

  1.  SOTAR  –  On this website, you can search for sex offenders or register to be emailed or texted when an offender moves into your neighborhood. Note, the SOTAR list only contains the names of serious sex offenders who qualified by state statute to be placed on the list.
  2. Get a FREE complete printed copy of all of the sex offenders listed in your area at the sheriff’s office at 4000 Justice Way, Castle Rock, Colorado. You will need to present a valid ID and fill out two request forms.   We cannot mail, email or fax the list.

Think someone you know is a sex offender?

Some sex offenders fail to register and may engage in questionable behavior. If you suspect someone of being a sex offender, please report it to Detective Charlie Erickson at 303-784-7828 or email  In most cases, you can remain anonymous.

The Colorado Bureau of Investigation (CBI) maintains a website of sex offenders who have failed to register and who have been convicted of two or more crimes involving unlawful sexual behavior. The list will contain the sex offender’s photograph, physical description, last known address, and conviction information.