5
columbia
colombia it shares a border with panama
Costa Rica and Columbia border Panama.
Brazil, Panama, Ecuador, Peru and Venezuela
Panama, Venezuela, Brazil, Peru, and Ecuador 5 countries border Columbia
Chile, Bolivia, Brazil, Equador, and Columbia
Venezuela, Columbia, Costa Rica
United States, Mexico, Venezuela, and Columbia.
Russia with a maritime border and Canada by British Columbia and Yukom Territories.
The Columbia River borders most of the length between Washington & Oregon.
Washington is bordered by Oregon to the south, Idaho to the east and the Canadian province of British Columbia to the north.