Please answer the following question by reasoning step-by-step.
Context: Common-law marriage in the United States can still be contracted in the District of Columbia as well as in the following nine states: Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, South Carolina, Texas, and Utah.\n\nQuestion: what are the common law states in the united states?

Colorado , Iowa , Kansas , Montana , Oklahoma , Rhode Island , South Carolina , Texas , and Utah
To answer this question, we should know that: Common-law marriage in the United States can still be contracted in the District of Columbia as well as in the following nine states: Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, South Carolina, Texas, and Utah.

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The answer: Colorado , Iowa , Kansas , Montana , Oklahoma , Rhode Island , South Carolina , Texas , and Utah