What are all the countries in the Western Hemisphere?
The answer is not as easy as it seems. A lot depends on the meridian you are using to divide the hemispheres and whether you consider partial or whole involvement. The list provided is from the US State Department. However, other countries could be considered to be part of the hemisphere if you include partial land areas. For example, France and Spain are in both East and Western hemispheres along the IERS Reference Median. Russia is in both along the 180th Meridian. The following list can be considered complete because it references only entire countries located in the hemisphere. Additional resources have been provided if you require any countries with land mass in the hemisphere.
Antigua and Barbuda
St. Kitts and Nevis
St. Vincent and the Grenadines
Trinidad and Tobago