Hazel Green was an unincorporated community in Delaware County, Iowa, United States.

The first settler, named Christopher Flint, moved to the area in 1853.

The post office was established in June 1856, and Flint served as the first postmaster.

A schoolhouse was built in 1859, and a general store and creamery were added in 1878.

[4] The site is mostly abandoned,[5] with only a few scattered farms in the area.