Elkhorn River

{{for|the stream in Oregon|Elkhorn Creek (Marion County, Oregon)}}

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

{{More citations needed|date=December 2009}}

{{Infobox river

| name = Elkhorn River

| image = Elkhorn River from Cowboy Trail W of 519 Av.JPG

| image_alt =

| image_caption = The Elkhorn River in Antelope County,
April 2010

| pushpin_map = USA Nebraska

| pushpin_map_size =

| pushpin_map_caption = Location of the mouth of the Elkhorn River in Nebraska

| pushpin_map_alt =

| source1_location = Confluence of North Fork and South Fork

| source1_coordinates = {{coord|42|36|36|N|099|11|00|W}}

| mouth_location = Confluence with Platte

| mouth_coordinates = {{coord|41|07|12|N|096|18|42|W|display=inline,title}}

| progression = Platte—Missouri—Mississippi

| length = {{convert|290|mi|km|abbr=on}}

| source1_elevation = {{convert|2162|ft|m|abbr=on}}

| mouth_elevation = {{convert|1070|ft|m|abbr=on}}

| discharge1_location=near Waterloo

| discharge1_avg ={{convert|1529|cuft/s|m3/s|abbr=on}}{{Cite web|url=https://waterdata.usgs.gov/ne/nwis/annual/?format=sites_selection_links&search_site_no=06800500&agency_cd=USGS&referred_module=sw|title = USGS Surface Water data for Nebraska: USGS Surface-Water Annual Statistics}}

| basin_size =

| river_system =

| tributaries_left =

| tributaries_right =

}}

The Elkhorn River is a river in northeastern Nebraska, United States,{{gnis|829066|Elkhorn River}} that originates in the eastern Sandhills and is one of the largest tributaries of the Platte River, flowing {{convert|290|mi}}{{cite map|url=http://viewer.nationalmap.gov/viewer/|title=The National Map|website=viewer.nationalmap.gov|publisher=United States Geological Survey|access-date=10 Feb 2011|url-status=dead |archive-url=https://web.archive.org/web/20120329155652/http://viewer.nationalmap.gov/viewer/|archive-date=29 March 2012|via=Wayback Machine}} and joining the Platte just southwest of Omaha, approximately {{convert|1|mi|km}} south and {{convert|3|mi|km}} west of Gretna.

Located in northeast and north-central Nebraska, the Elkhorn River basin encompasses approximately {{convert|7000|sqmi|km2}}. The Elkhorn has several tributaries, including its own North and South forks, Logan Creek Dredge, Rock Creek and Maple Creek.