The Hietaniemi cemetery (Finnish: Hietaniemen hautausmaa, Swedish: Sandudds begravningsplats) is located mainly in the Lapinlahti quarter and partly in the Etu-Töölö district of Helsinki, the capital of Finland.

It is the location for Finnish state funeral services and is owned by the Evangelical Lutheran Church of Finland.

In the centre of the military cemetery are the tombs of the unknown soldier and Marshal C. G. E. Mannerheim, commander-in-chief of the Finnish Defence Forces during World War II, and the sixth president of Finland (1944–1946).

Hietaniemi means "sand cape" and is a headland located centrally in Helsinki.

In the 2010s, it was confirmed that an extensive catacomb network was located beneath the Orthodox cemetery.