Judge Tamara Sullivan
Judge · Costilla County, Colorado · 304 Main Street P.O. Box 301 San Luis, CO 81152
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Judge Sullivan is a native of Cortez, Colorado. She earned a bachelor's degree in English from Regis University in 2006, a master's degree in environmental law and policy from Vermont Law School in 2007, and her law degree from the University of Denver in 2012. Before her appointment to the Costilla County Court, she was a staff attorney with Colorado Legal Services in the San Luis Valley.
She serves as the Costilla County Court judge.
State evaluation (Colorado Commission on Judicial Performance): 2026: meets performance standards (vote 6-0).
State survey for the 2026 evaluation (run by Market Decisions Research): 4 of 104 attorneys invited by email answered; 5 of 669 non-attorneys invited by email answered; the judicial district has 46,108 residents (2020 Census). State survey report.
We searched the Colorado Court of Appeals’ weekly announcements from June 1, 2023 to October 22, 2026 and found no decisions on this judge’s rulings. This is not a grade: only appealed rulings appear in those announcements, and a judge with few appealable rulings, or one appointed recently, will often have none.