A national monument is a monument constructed in order to commemorate something of importance to national heritage, such as a country's founding, independence, war, or the life and death of a historical figure. The term may also refer to a specific monument status, such as a national heritage site, by reason of their cultural importance rather than age). National monument status is usually granted to colossal symbols of national identity.

Structures or areas deemed to be of national importance and afforded protection by the state are part of a country's cultural heritage. These national heritage sites are often called something different per country and are listed by national conservation societies. Romania has listed at least one plant as a national monument, Nymphaea lotus bar. thermalis.