Koosah Falls

{{Infobox waterfall

| name = Koosah Falls

| photo = Koosah Falls, Oregon.jpg

| photo_width =

| photo_caption = Koosah Falls in the spring

| location = Linn County, Oregon, U.S.

| coords = {{coord|44.34442|-122.00048|type:waterbody_region:US-OR|display=inline,title}}

| elevation = {{Convert|2707|ft|m|0|abbr=on}}

| type = Vertical Block

| height = {{Convert|64|ft|m|0|abbr=on}}

| width =

| height_longest =

| average_width = {{Convert|60|ft|m|0|abbr=on}}

| number_drops = 1

| average_flow = {{convert|600|ft3/s|abbr=on}}

| watercourse =

| world_rank =

}}

Koosah Falls, also known as Middle Falls, is the second of the three major waterfalls on the McKenzie River in the heart of the Willamette National Forest in Linn County, in the U.S. state of Oregon. The waterfall is notable for its main drop of {{convert|64|ft|m}} that plunges into a considerable pool, south of Santiam Pass.{{cite web |url= http://www.worldwaterfalldatabase.com/waterfall/Koosah-Falls-4270|title= Koosah Falls—Linn County, Oregon, United States|last1= |first1= |last2= |first2= |date= |website=World Waterfall Database|publisher= |access-date= 15 May 2017|quote=}}{{cite gnis|id=1122837|name=Koosah Falls|entrydate=28 November 1980|accessdate=15 May 2017}} Koosah Falls is located {{Convert|0.5|mi}} downstream south of Sahalie Falls, southeast of Salem, Oregon, northeast of Eugene, Oregon and west of Mt. Washington.