Płonkowo [pwɔŋˈkɔvɔ] is a village in the administrative district of Gmina Rojewo, within Inowrocław County, Kuyavian-Pomeranian Voivodeship, in north-central Poland.

The parish included: Dobiesławice, Glinno, Kaczkowo, Mierogonowice, Płonkowko, Rojewo, Sciborze, Topola, and Wierzchosławice.

These villages appeared in the parish later: Dąbie; Glinienko (alias Glinki or Klein Glinnen); Godzieba, Janska Wies; Jedrejowo; Jezuicka Struga; Jurek; Kaczkowska Nowa Wies (alias Kaczkower Neudorf); Kamienny Brod; Kepa; Lukaszewo, Racławice; Wolanow; and Wybranowo.

In 1663, Stanisław Tuczyński sold Kaczkowo, Skalmierowice, Mierogonowice, Jędrzejewo, Glinno, and Olęndry to Tomasz Przetocki.

The church contains the remains of Marian Skrzypczak, who was shot in Płonkowo in 1939 by Hitler youth, and was beatified by Pope John Paul II in 1999.