August "Agi" Lindegren (December 29, 1858 – 16 November 1927) was a Swedish architect and illustrator.

Lindegren was born at Hudiksvall in Gävleborg County, Sweden.

He then traveled to France, Germany and Italy for various periods over four years.

In 1885, Lindegren became an architect at the Swedish government agency for the administration of state buildings (Överintendentsämbetet (sv)).

[2]Among his designs were Biological Museum (Biologiska museet) at Djurgården in Stockholm (1893), Gustaf Vasa Church (Gustaf Vasa kyrka) in the Vasastaden district of Stockholm (1906) and New Church (Ny kyrka) in Värmland (1887-1889).