Round Barn, Washington Township (Janesville, Iowa)

{{Use mdy dates|date=February 2025}}

{{Infobox NRHP

| name = Round Barn, Washington Township

| nrhp_type =

| image = RoundBarnJanesvilleIowa.jpg

| caption =

| location = Off U.S. Route 218

| nearest_city = Janesville, Iowa

| coordinates = {{coord|42|35|7|N|92|27|40|W|display=inline,title}}

| locmapin = Iowa#USA

| area = less than one acre

| built = 1917

| architect =

| architecture =

| added = June 30, 1986

| mpsub = {{NRHP url|id=64000152|title=Iowa Round Barns: The Sixty Year Experiment TR}}

| refnum = 86001417{{NRISref|2009a}}

}}

The Round Barn, Washington Township is a historic building located south of Janesville, Iowa in Black Hawk County, United States. It was built in 1917 as a dairy barn. The building is a true round barn that measures {{convert|60|ft|m}} in diameter.{{cite web|url=http://www.dalejtravis.com/rblist/rbia.htm|title=Iowa Round Barn List|publisher=Round Barns & Covered Bridges|accessdate=2011-01-05|author=Dale Travis}} The structure is constructed in clay tile and features an aerator and a two-pitch roof. It was built around a silo with a water tank on top of it. While that is typical of this type of structure, it is the only one known to exist in Iowa.{{cite web|url={{NRHP url|id=86001417}}|title=Round Barn, Washington Township|publisher=National Park Service|accessdate=2016-11-20|author=}} with {{NRHP url|id=86001417|photos=y|title=photo}} It has been listed on the National Register of Historic Places since 1986.