Merrymeeting River

{{short description|River in the U.S.}}

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

{{Infobox river

| name = Merrymeeting River

| name_native =

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| image = Merrymeeting.jpg

| image_caption = The Merrymeeting River in Alton, New Hampshire

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| pushpin_map = New Hampshire#USA

| pushpin_map_size = 250 px

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| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = New Hampshire

| subdivision_type3 = Counties

| subdivision_name3 = Strafford, Belknap

| subdivision_type4 = Towns

| subdivision_name4 = New Durham, Alton

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| length = {{convert|10.0|mi|km|abbr=on}}

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| source1 = Merrymeeting Lake

| source1_location = New Durham

| source1_coordinates= {{coord|43|28|38|N|71|10|44|W|type:river|display=inline}}

| source1_elevation = {{convert|647|ft|m|abbr=on}}

| mouth = Lake Winnipesaukee

| mouth_location = Alton Bay

| mouth_coordinates = {{coord|43|28|12|N|71|14|2|W|type:river|display=inline,title}}

| mouth_elevation = {{convert|504|ft|m|abbr=on}}

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| tributaries_left = Coffin Brook

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The Merrymeeting River is a {{convert|10.0|mi|km|adj=mid|-long}}[http://www.granit.unh.edu New Hampshire GRANIT state geographic information system] river in the Lakes Region of central New Hampshire in the United States. It is a tributary of Lake Winnipesaukee, part of the Merrimack River watershed.

The river begins at the outlet of Merrymeeting Lake in the town of New Durham. The river flows south through a chain of ponds to the village proper of New Durham. After passing under New Hampshire Route 11, the river enters Merrymeeting Marsh and turns sharply to the northwest, the course it will take the rest of the way to its end. The river crosses a small dam at Alton and reaches Lake Winnipesaukee at the community of Alton Bay, the southernmost point on the lake.