Hamblen Development Historic District, Historic residential district in West End, Portland, United States.

The Hamblen Development Historic District covers the south side of one Danforth Street block between Brackett and Clark Streets. It holds five Greek Revival brick buildings: the four-unit Hamblen Block rowhouse at 188–194, a mirrored duplex at 196–198, the freestanding three-bay house at 200, and a duplex at 206–208 with a modillioned cornice.

The brothers Eli, Joseph, and Nathaniel Hamblen began this residential development in 1835 as one of Maine's early real estate projects. This founding showed how Portland started to grow and expand during that period.

The Hamblen Block at 188–194 Danforth Street is a row of four three-storey brick houses, and the duplex at 206–208 has a modillioned cornice; the left-hand unit there keeps a few period wrought iron grills. The name comes from the Hamblen brothers, Eli, Joseph and Nathaniel, who built the row as a speculative venture in 1835–36.

The district sits between Brackett and Clark Streets in Portland's West End and is easy to explore on foot. The buildings are plainly visible from outside and can be observed while walking through the neighborhood.

The buildings preserve rare features such as decorated roof cornices and ornate wrought iron grilles that have barely changed since their construction. These fine details show the craftsmanship of builders who valued quality in that era.