15 Most Adulterous States in America

3 – Colorado

Insider Monkey Adultery Score – 26.8

According to the latest rankings by Ashley Madison, three Colorado cities were in the top twenty cities for infidelity in the United States. These cities are Denver, Colorado Springs, and Aurora. Colorado is a no-fault state, in which a couple can file for divorce without any grounds for divorce. The courts in the state do not consider any evidence of marital misconduct.