2018 Fed Cup Americas Zone

The Americas Zone was one of three zones of regional competition in the 2018 Fed Cup.

Group I

 * Venue: Club Internacional de Tenis, Asunción, Paraguay (clay)
 * Date: 7–10 February

The seven teams were divided into two pools of three and four teams. The two pool winners took part in a play-off to determine the nation advancing to the World Group II play-offs. The two nations finishing last and second last in their pools took part in relegation play-offs, with the two losing nations being relegated to Group II for 2019. Puerto Rico withdrew before the tournament due to the economic circumstances caused by Hurricane Maria.

Seeding

 * 1 Fed Cup Rankings as of 13 November 2017

Final placements

 *  was promoted to the 2018 Fed Cup World Group II Play-offs.
 * ' and ' were relegated to Americas Zone Group II in 2019.

Group II

 * Venue 1: Club Deportivo La Asunción, Metepec, Mexico (hard)
 * Venue 2: Centro Nacional de Tenis de la FET, Guayaquil, Ecuador (clay)
 * Dates: 20–23 June and 18–21 July

Seeding

 * 1 Fed Cup Rankings as of 23 April 2018

Final placements

 * ' and ' were promoted to Americas Zone Group I in 2019.