Rezu Mare

{{Infobox river

| name = Rezu Mare

| native_name =

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| image_caption =

| pushpin_map = Romania

| subdivision_type1 = Country

| subdivision_name1 = Romania

| subdivision_type2 = Counties

| subdivision_name2 = Harghita

| length = {{convert|16|km|abbr=on}}

| width_min =

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| source1 = Giurgeu Mountains

| source1_location =

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| mouth = Putna

| mouth_location = near Tulgheș

| mouth_coordinates = {{coord|46.9360|25.7499|display=inline,title}}

| mouth_elevation =

| progression = Putna→ Bistricioara→ {{RBistrița}}

| river_system =

| basin_size = {{convert|47|km2|abbr=on}}

| tributaries_left = Pârâul Vacii, Roșu Mare, Pârâul lui Grigore, Beneș, Jang

| tributaries_right =

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}}

The Rezu Mare is a left tributary of the river Putna in Romania.{{GeoSource|RO|Atlas|393|XII.1.53.40.11.3}} It flows into the Putna near Tulgheș. Its length is {{convert|16|km|abbr=on}} and its basin size is {{convert|47|km2|abbr=on}}.{{GeoSource|RO|Atlas|393|XII.1.53.40.11.3}}