Pool B (La Paz) of the 2021 Billie Jean King Cup Americas Group II was one of two pools in the Americas Group II of the 2020–21 Billie Jean King Cup. Four teams competed in a round robin competition, with the top team and bottom teams proceeding to their respective section of the play-offs: the top team played for advancement to Group I.

		BOL	HON	PUR	BAR	RR W–L	Set W–L	Game W–L	Standings
2	Bolivia		3–0	3–0	3–0	9–0	18–1 (95%)	113–43 (72%)	1
5	Honduras	0–3		2–1	3–0	5–4	11–8 (58%)	84–80 (51%)	2
4	Puerto Rico	0–3	1–2		3–0	4–5	9–14 (39%)	96–114 (46%)	3
7	Barbados	0–3	0–3	0–3		0–9	3–18 (14%)	63–119 (35%)	4

Standings are determined by: 1. number of wins; 2. if two teams have the same number of wins, head-to-head record; 3. if three teams have the same number of wins, (a) number of matches won in the group, then (b) percentage of sets won in the group, then (c) percentage of games won in the group, then (d) Billie Jean King Cup rankings.^[1]

• Billie Jean King Cup structure