Marcela Arroyo Vergara[a] (born 13 December 1984) is a Mexican former professional tennis player.

Arroyo, a right-handed player, competed on the professional tour in the early 2000s, reaching a best doubles ranking of 307 in the world.

She won four ITF doubles titles, all partnering with Melissa Torres Sandoval in 2004.

Arroyo represented Mexico in a total of seven Fed Cup ties, three in 2004 and four in 2005, for a 5–3 overall win–loss record.

At the 2005 Summer Universiade in Turkey, Arroyo teamed up with Lorena Arias to win a bronze medal for Mexico in the women's doubles event.