**United States leads the Copa America 2028 host market at 66% implied probability, driven by accelerating talks between CONMEBOL and CONCACAF reported in early October 2026.** Multiple outlets, including The Times and MARCA, indicate U.S. infrastructure, commercial appeal from the 2024 Copa América and 2026 World Cup, and logistical capacity have positioned it ahead of South American alternatives. Argentina and Ecuador bids appear sidelined over infrastructure and security concerns, while Brazil’s 15.8% reflects limited recent momentum despite past hosting experience. Lower odds for Venezuela, Bolivia, Uruguay, Colombia, Peru, and others align with the absence of fresh developments or official rotation signals favoring them. The 2028 Summer Olympics overlap in Los Angeles adds scheduling complexity but has not derailed U.S. discussions. No host has been formally announced as of October 9, 2026, leaving room for shifts if negotiations stall.