Alicja Sakaguchi (born 1954 in Szczecin) is a linguist and university professor in the fields of Esperanto and interlinguistics.

Alicja Sakaguchi earned a master's degree after studying Hungarian and Esperantology at Eötvös Loránd University in Budapest (1974 to 1979); she completed her doctorate in 1982.

From 2001 to 2002 she was assistant professor of modern languages at Adam Mickiewicz University in Poznań; since 2003 she has been a professor there, teaching interlinguistics, Esperanto, German and intercultural communication.

She is married to Takashi Sakaguchi, a Japanese man whom she met through the Esperanto movement, and has two adult children, Dai and Leo, who are native speakers of Esperanto.

Both sons were born in Mömbris[1] in Germany, a town close to Frankfurt, where she was teaching at the time.