Do you need insurance for small utility trailer?

Insurance laws vary by state. In all the states I am aware of the liability would cover the trailer from the vehicle pulling it but physical damage does not. If you do not have a need to cover it for physical damage then no insurance is needed for the trailer. Be aware that it is not covered for damage to the trailer whether being towed or parked in the yard. Hope this helped. For full disclosure, I own and operate a small Independent Insurance Agency and have for the past 22 years. I also worked for a direct writer for the 3 years before that.