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.^[1]

Seeding

Pot	Nation	Rank1	Seed
1	Paraguay	19	1
	Argentina	20	2
2	Brazil	27	3
	Chile	30	4
3	Colombia	38	5
	Venezuela	41	6
	Guatemala	45	7

• ¹Fed Cup Rankings as of 13 November 2017

Pools

	Pool A	PAR	COL	CHI
1	Paraguay (2–0)		3–0	2–1
2	Colombia (1–1)	0–3		3–0
3	Chile (0–2)	1–2	0–3

	Pool B	BRA	ARG	VEN	GUA
1	Brazil (3–0)		2–1	2–1	3–0
2	Argentina (2–1)	1–2		3–0	3–0
3	Venezuela (1–2)	1–2	0–3		3–0
4	Guatemala (0–3)	0–3	0–3	0–3

Play-offs

Placing	A Team	Score	B Team
Promotional	Paraguay	2–0	Brazil
3rd–4th	Colombia	0–2	Argentina
Relegation	Chile	2–0	Venezuela
Relegation	—		Guatemala

Final placements

Placing	Teams
Promoted/First	Paraguay
Second	Brazil
Third	Argentina
Fourth	Colombia
Fifth	Chile
Relegated/Sixth	Venezuela	Guatemala

•  Paraguay was promoted to the 2018 Fed Cup World Group II Play-offs.
•  Venezuela and  Guatemala 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

Pot	Nation	Rank1	Seed
1	Ecuador	51	1
	Mexico	53	2
	Peru	56	3
	Bolivia	65	4
2	Costa Rica	67	5
	Trinidad and Tobago	70	6
	Dominican Republic	71	7
	Cuba	75	8
3	Uruguay	84	9
	Bahamas	88	10
	Barbados	90	11
	Honduras	94	12
	Bermuda	99	13

• ¹Fed Cup Rankings as of 23 April 2018

Pools

	Pool A (Metepec)	MEX	DOM	BAR
1	Mexico (2–0)		3–0	3–0
2	Dominican Republic (1–1)	0–3		2–1
3	Barbados (0–2)	0–3	1–2

	Pool B (Metepec)	PER	CUB	URU
1	Peru (2–0)		2–1	3–0
2	Cuba (1–1)	1–2		2–1
3	Uruguay (0–2)	0–3	1–2

	Pool A (Guayaquil)	ECU	CRC	HON
1	Ecuador (2–0)		3–0	3–0
2	Costa Rica (1–1)	0–3		2–1
3	Honduras (0–2)	0–3	1–2

	Pool B (Guayaquil)	BAH	BOL	TTO	BER
1	Bahamas (3–0)		2–1	2–1	3–0
2	Bolivia (2–1)	1–2		2–1	3–0
3	Trinidad and Tobago (1–2)	1–2	1–2		3–0
4	Bermuda (0–3)	0–3	0–3	0–3

Play-offs

Placing (Metepec) A Team Score B Team Promotional  Mexico 2–0  Peru 3rd–4th  Dominican Republic 0–2  Cuba 5th–6th  Barbados 0–3  Uruguay

Placing (Guayaquil) A Team Score B Team Promotional  Ecuador 2–0  Bahamas 3rd–4th  Costa Rica 2–1  Bolivia 5th–6th  Honduras 2–1  Trinidad and Tobago 7th —  Bermuda

Final placements

Placing	Teams
Promoted	Mexico	Ecuador
Second	Peru	Bahamas
Third	Cuba	Costa Rica
Fourth	Dominican Republic	Bolivia
Fifth	Uruguay	Honduras
Sixth	Barbados	Trinidad and Tobago
Seventh	Bermuda

•  Mexico and  Ecuador were promoted to Americas Zone Group I in 2019.