Gustaf Gabriel Hällström (25 November 1775 – 2 June 1844) was a Finnish scientist.
He was active in several fields, contributing to the establishment of an astronomical observatory in Turku as well as initiating the earliest systematic meteorological observations in Finland.
His children were ennobled in recognition of his achievements.
Source: Ars Universitaria 1640–1990: Muotokuvia Helsingin yliopiston kokoelmista, p. 46. Helsingin yliopisto 1990. License: CC-PD-Mark PD-Art (PD-old-100)