Gustav Evertsson Horn

{{Infobox Politician

| name = Baron Gustav Evertsson Horn

| image = Porträtt. Gustav Horn - Skoklosters slott - 87194.tif

| caption =

| birth_date = 28 May 1614

| birth_place = Lemu, Finland

| death_date = {{death date and age|df=y|1666|02|27|1614|05|28}}

| death_place = Stade, Germany

| residence =

| office = Governor-general of Ingria

| term_start = 1654

| term_end = 1657

| predecessor = Erik Stenbock

| successor = Krister Klasson Horn

| office2 = Governor General of Finland

| term_start2 = 1657

| term_end2 = {{cn span|1658|date=November 2022}}

| predecessor2 = Per Brahe the Younger{{cn|date=November 2022}}

| successor2 = {{ill|Herman Fleming|sv|Herman Fleming (1619–1673)}}{{cn|date=November 2022}}

| office3 = Governor General of Bremen-Verden

| term_start3 = 1663

| term_end3 = 1666

| predecessor3 = Hans Christoff Königsmarck

| successor3 = Henrik Horn

| constituency =

| party =

| religion =

| occupation =

| majority =

| relations =

| spouse = Maria Mörner,
Barbro Kurch,
Maria Silfverhielm

| children =

| website =

| footnotes =

}}

Baron Gustav Evertsson Horn of Marienburg (28 May 1614 – 27 February 1666) was a Finnish-Swedish military man and politician. He was a member of the Privy Council of Sweden and Governor General.

Horn, the son of Field Marshal Evert Horn, was born in 1614 in Southwest Finland, at the time a part Sweden. He became captain in 1635, and a colonel in 1640. In 1651, he was, along with cousin Henrik Horn, raised to a baron. Gustav Horn became a member of the Swedish Privy Council in 1653, and in the following year, he was assigned the role of Governor General of Ingria and Kexholm, an office he left for the assignment of Governor General of Finland in 1657. In 1656 he was appointed general, in 1658 rikstygmästare and in 1663 field marshal. The latter year he also became Governor General of Bremen-Verden. Gustav Evertsson Horn died in Stade, Germany, in 1666.{{cite web|url=https://runeberg.org/nfbk/0587.html|title=Nordisk Familjebok - Gustaf Evertsson Horn|year=1909|work=Nordisk Familjebok at runeberg.org|language=Swedish|access-date=2009-06-20}}{{cite web|url=http://members.fortunecity.com/mikaelxii/Svea/Province/Bremen/GHorn.html|title=Gustaf Evertsson Horn|access-date=2009-06-20|url-status=dead|archive-url=https://archive.today/20120713201608/http://members.fortunecity.com/mikaelxii/Svea/Province/Bremen/GHorn.html|archive-date=2012-07-13}}