Hästholmen is a locality in Ödeshög Municipality, in Östergötland County, Sweden. Hästholmen lies at 99 m above sea level. It has 339 inhabitants (2023). The nearest city is Motala, 37 km to the northeast. Among the landmarks around are Rök runestone (7.9 km), Vadstena Castle (23 km) and Vadstena Abbey (24 km).