Hans Fleming (born around 1545 in Namur, died in 1623) was a Flemish fortress builder, architect and sculptor active in Sweden.
In 1605 he was also working at Älvsborg, Gullberg, Nylöse and the newly built Karl IX's Göteborg.
As early as 1603, however, Fleming had been called in to decide what should be built on Älvsborg and Gullberg, and at the beginning of the following year he had mapped out the new town on Hisingen, for which he had completed a drawing, as well as for its fortification.
In 1613 he received a new order as an architect in Jönköping and made a drawing for a new city there and for city fortifications, and after the former was approved by the king, Fleming demarcated the city and allocated its plots and then supervise the buildings; Fleming's fortification drawing was approved with some modifications, after which the fortification work began.
He later delivered stone carving work for stairs and portals, including Vaxholm Fortress and Tre Kronor in Stockholm.