There are multiple sites you can search:
On Family Watchdog, you can enter your street address and it will plot a map of any sex offenders in the area.
Search by Town or Zip Code. Sex Offender Fact Sheet Notification of Release in Rhode Island:
It even provides a listing of Level III Offenders in the state. Sex Offender Community Notification Information. Pursuant to Rhode Island General Laws 11-37.1-1 ET SEQ., the individuals who appears below have been designated a Level III Sex Offender by the Sex Offender Board of Review and/or the Superior Court. The Board and/or the Court have determined that this individual is at a high risk to re-offend and that the degree of dangerousness posed to the public is such that a public safety interest is served by the providing information below to the public availability of notification information
Sex Offender Registry Board of Massachusetts
Dru Sjodin National Sex Offender Public Website