Martin Brook

{{Use American English|date=February 2025}}

{{Infobox river

| name = Martin Brook

| name_native =

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| pushpin_map = New York

| pushpin_map_size =

| pushpin_map_caption= Location of the mouth of Martin Brook

| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = New York

| subdivision_type3 =

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| subdivision_type4 = County

| subdivision_name4 = Otsego

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| source1 =

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| source1_coordinates= {{coord|42.3613889|-75.32|format=dms}}

| source1_elevation =

| mouth = Susquehanna River

| mouth_location =

| mouth_coordinates = {{coord|42.3231365|-75.3115635|display=inline,title|format=dms}}{{cite gnis

| id = 956579

| name = Martin Brook

| accessdate = 2018-09-09}}

| mouth_elevation = {{convert|981|ft|abbr=on}}

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Martin Brook is a river in Otsego County, New York. It converges with the Susquehanna River in Unadilla.