Croatian Democratic Alliance of Slavonia and Baranja

{{Infobox political party

| country = Croatia

| native_name = Hrvatski demokratski savez
Slavonije i Baranje

| name = Croatian Democratic Alliance
of Slavonia and Baranja

| logo = HDSSBlogo.png

| logo_size = 230px

| leader = Branimir Glavaš

| foundation = {{Start date|2006|5|6|df=y}}

| headquarters = Osijek, Croatia

| ideology = {{ubl|Slavonian regionalism|National conservatism|Green conservatism}}

| position = Centre-right

| colorcode = {{party color|Croatian Democratic Alliance of Slavonia and Baranja}}

| national =

| european =

| international =

| colours = {{colorbox|{{party color|Croatian Democratic Alliance of Slavonia and Baranja}}}} Red
{{colorbox|Gold}} Gold

| website = {{URL|http://www.hdssb.hr}}

| seats1_title = Sabor

| seats1 = {{Composition bar|0|151|hex={{party color|Croatian Democratic Alliance of Slavonia and Baranja}}}}

| seats2_title = European Parliament

| seats2 = {{Composition bar|0|12|hex={{party color|Croatian Democratic Alliance of Slavonia and Baranja}}}}

| seats5_title = County Prefects

| seats5 = {{Composition bar|0|21|hex={{party color|Croatian Democratic Alliance of Slavonia and Baranja}}}}

| seats6_title = Mayors

| seats6 = {{Composition bar|0|128|hex={{party color|Croatian Democratic Alliance of Slavonia and Baranja}}}}

}}

Croatian Democratic Alliance of Slavonia and Baranja ({{langx|hr|Hrvatski demokratski savez Slavonije i Baranje}} or HDSSB){{cite web|url=http://hidran.hidra.hr/stranke/s035250h.htm |title=Hrvatski demokratski savez Slavonije i Baranje - HDSSB |access-date=February 28, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20110721100255/http://hidran.hidra.hr/stranke/s035250h.htm |archive-date=July 21, 2011 }} is a regionalist,{{Cite web|url=http://www.parties-and-elections.eu/croatia.html|title=Croatia|last=Nordsieck|first=Wolfram|date=2020|website=Parties and Elections in Europe}} National conservative{{cite journal|last=Zulianello|first=Mattia|date=April 2020|title=Varieties of Populist Parties and Party Systems in Europe: From State-of-the-Art to the Application of a Novel Classification Scheme to 66 Parties in 33 Countries|journal=Government and Opposition|volume=55|issue=2|pages=327–347|publisher=Cambridge University Press|doi=10.1017/gov.2019.21|doi-access=free|hdl=11368/3001222|hdl-access=free}} political party in the Eastern Croatian region of Slavonia. Until 2015, the HDSSB was considered right-wing populist.

It was formally founded on 6 May 2006,{{cite web|url=http://hidra.srce.hr/arhiva/18/5093/stathdssib.doc |format=DOC |title=STATUT HRVATSKOG DEMOKRATSKOG SAVEZA SLAVONIJE I BARANJE |website=Hidra.srce.hr |access-date=2016-03-11}} but had its origins one year earlier, when the group of local Croatian Democratic Union (HDZ) politicians, led by War of Independence veteran Branimir Glavaš, launched a political organisation with a very similar name, the Croatian Democratic Assembly of Slavonia and Baranja ({{langx|hr|Hrvatski demokratski sabor Slavonije i Baranje}}) at the eve of May 2005 local elections. The stated aim of new group was the regional reorganisation of Croatia in order to improve conditions in Slavonia, which was - according to Glavaš and his supporters - neglected by central government in Zagreb.

The HDZ leadership under Ivo Sanader denounced that platform and ejected Glavaš out of the party. However, most of the local HDZ organisation followed Glavaš and his independent election ticket that won a relative majority in the Osijek-Baranja County and City of Osijek assemblies. That group of independents became the HDSSB on 6 May 2006. In the 2007 Croatian parliamentary election they received 44,552 votes or 1.8% of the electorate, and won 3 seats in the Croatian Parliament. They improved their position in Croatian Parliament in next election by winning 6 seats.

In 2014, HDSSB became part of the Alliance for Croatia coalition, which was dissolved in 2015.