Ingrian flag is the national flag of Ingrian finns.
It is a Nordic cross flag with a yellow background and a red scandinavian cross with an inserted narrow blue cross. The colours of the flag were taken from the historical coat of arms of Ingria.
The author of the flag is captain Eero Ilmari Haapakoski. The flag was designed for volunteer West Ingrian battalion formed at March 26, 1919 in Estonia. In its first attack at May 12, 1919 the battalion was already with its own flag. Later West Ingrian battalion increased to the regiment.