Ankarsrum is a locality in Västervik Municipality, in Kalmar County, Sweden. Ankarsrum lies at 72 m above sea level. It has 1,207 inhabitants (2023). The nearest city is Västervik, 18.9 km to the east. Among the landmarks around are Smalspårsjärnvägen Hultsfred–Västervik (19.2 km), Hjorteds kyrka (9.2 km) and Sankta Gertruds kyrka, Västervik (18.8 km).