Hubert Donat Alfred Agache[1] (24 February 1875 – 4 May 1959) was a French architect and urbanist known for his work in Brazil.

[2] He studied at the École des Beaux-Arts in Paris under Victor Laloux.

[3] He formally planned the Brazilian cities of Rio de Janeiro, Recife, Porto Alegre and Curitiba in the 1940s and 1950s, supported by the Estado Novo regime in Brazil.

And in Porto Alegre his plans for the Redenção Park were realised to host the Farroupilha Revolution centennial fair.

[5] Agache also co-founded the French Society for Urban Studies.