Martin River

{{For|the stream in Romania|Râmnicul Sărat}}

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

{{Infobox river

| name = Martin River

| name_native =

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| map_size = 300

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| pushpin_map = USA Alaska

| pushpin_map_size = 300

| pushpin_map_caption= Location of the mouth of the Martin River in Alaska

| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = Alaska

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| subdivision_type4 = Borough

| subdivision_name4 = Kenai Peninsula

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| length = {{convert|7|mi|km|abbr=on}}{{cite book|last=Orth|first=Donald J.|author2=United States Geological Survey|title=Dictionary of Alaska Place Names: Geological Survey Professional Paper 567|url=https://dggs.alaska.gov/pubs/id/3920|format=PDF|publisher=United States Government Printing Office|year=1971|origyear=1967|page=626|access-date=December 16, 2013}}

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| source1 = Kenai Mountains, Kenai National Wildlife Refuge

| source1_location = Portlock Glacier

| source1_coordinates= {{coord|59|40|28|N|150|58|02|W|display=inline}}

| source1_elevation = {{convert|1810|ft|abbr=on}}Derived by entering source coordinates in Google Earth.

| mouth = Kachemak Bay

| mouth_location = {{convert|20|mi|km}} northeast of Homer

| mouth_coordinates = {{coord|59|45|46|N|151|00|17|W|display=inline,title}}{{cite web | work = Geographic Names Information System| publisher = United States Geological Survey | date = March 31, 1981|url={{gnis3|1413488}}

| title = Martin River | accessdate = December 16, 2013}}

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The Martin River is a stream on the Kenai Peninsula in the U.S. state of Alaska. Beginning at Portlock Glacier in the Kenai Mountains, it flows north for {{convert|7|mi|km}} into Kachemak Bay. The upper river lies within Kenai National Wildlife Refuge.{{cite book|title=Alaska Atlas & Gazetteer|publisher=DeLorme|location=Yarmouth, Maine|page=62|edition=7th|year=2010|isbn=978-0-89933-289-5}} The river mouth is {{convert|20|mi|km}} northeast of Homer.