Pelagićevo (Serbian Cyrillic: Пелагићево) is a town and municipality in Republika Srpska, Bosnia and Herzegovina. It is located in the Posavina geographical region. As of 2013, the town has a population of 2,796 inhabitants, while the municipality has 5,220 inhabitants.

It was originally named Gornji Žabar, and was later renamed after Vaso Pelagić, a representative of utopian socialism in Serbia during the second half of the nineteenth century, born in the town in 1833.

The municipality was created after the Dayton Agreement from part of the pre-war municipality of Gradačac (the other part of the pre-war municipality is now in the Federation of Bosnia and Herzegovina).

Population of settlements – Pelagićevo municipality
	Settlements	1971.	1981.	1991.	2013.
	Total			13,256	5,220
1	Blaževac				318
2	Donja Tramošnica				381
3	Gornja Tramošnica				347
4	Pelagićevo	3,398	3,214	3,069	2,529
5	Porebrice				344
6	Turić				293

Ethnic composition – Pelagićevo town
	2013.	1991.	1981.	1971.
Total	2,529 (100,0%)	3,069 (100,0%)	3,214 (100,0%)	3,398 (100,0%)
Serbs	2,502 (98,93%)	2,968 (96,71%)	3,103 (96,55%)	3,340 (98,29%)
Croats	12 (0,474%)	16 (0,521%)	22 (0,685%)	36 (1,059%)
Others	10 (0,395%)	34 (1,108%)	31 (0,965%)	13 (0,383%)
Bosniaks	5 (0,198%)	4 (0,130%)	5 (0,156%)	6 (0,177%)
Yugoslavs		47 (1,531%)	47 (1,462%)
Macedonians			4 (0,124%)	2 (0,059%)
Albanians			2 (0,062%)
Montenegrins				1 (0,029%)

Ethnic composition – Pelagićevo municipality
	2013.	1991.
Total	5,220 (100,0%)	13,256 (100,0%)
Serbs	3,330 (63,79%)	4,634 (34,96%)
Croats	1,850 (35,44%)	7,165 (54,05%)
Others	27 (0,517%)	721 (5,439%)
Bosniaks	13 (0,249%)	736 (5,552%)

• Municipalities of Bosnia and Herzegovina

• Municipalities of Republika Srpska