Colorado Revised Statutes Title 19. Children's Code § 19-2.5-104. Venue

(1)(a) Proceedings in cases brought pursuant to this article 2.5 must be commenced in the county in which the alleged violation of the law, ordinance, or court order took place;  except that the court may order a change of venue based upon written findings that a change of venue is necessary to ensure that the juvenile receives a fair trial, in which case venue must be transferred to an appropriate jurisdiction prior to the findings of fact. When the court in which the petition was filed is in a county other than where the juvenile resides, such court may transfer venue to the court of the county of the juvenile's residence for the purposes of supervision after sentencing and entry of any order for payment of restitution. A transfer of venue may not be rejected for any reason except where venue would be improper.

(b) For purposes of determining proper venue, a juvenile who is placed in the legal custody of a county department of human or social services is deemed for the entire period of placement to reside in the county in which the juvenile's legal custodian is located, even if the juvenile is physically residing in a residential facility located in another county. If a juvenile is placed in the legal custody of a county department of human or social services, the court shall not transfer venue during the period of placement to any county other than the county in which the juvenile's legal custodian is located.