Sunja may refer to:
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Sunja, Sisak-Moslavina County, a village and municipality in Croatia
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Sunja (Sava)
Sunja is a river in central Croatia, a right tributary of Sava. It is long and its basin covers an area of .
Sunja rises in the mountainous forested areas of Zrinska Gora, south of the village of Lovča. It flows northward until it turns southea ...
, a river in Croatia
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Sunja River or Sunzha River, a river in Russia
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Sunja (name), a Korean female given name
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