thumb|Map of Yasu District with Meiji period (1890) area in yellow.
was a district located in Shiga Prefecture, Japan.
On October 1, 2004, the former town of Yasu absorbed the town of Chūzu, effectively turning Yasu District into Yasu City. Therefore, Yasu District was dissolved as a result of this merger.
As of 2003, the district had an estimated population of 49,155 and a density of 799.92 persons per km<sup>2</sup>. The total area was 61.45 km<sup>2</sup>.
Former Towns and villages
- Chūzu
- Yasu
Transition
Light blue autonomies are Yasu District's town, deep blue autonomies are Yasu District's village, and gray autonomies are others.
{| class="wikitable" style="font-size:x-small"
!April 1, 1889
!1889 - 1926
!1927 - 1954
! colspan="2" |1955 - 1989
!1990 -
!Now
|-
| style="background-color:#9cf;" | Moriyama (守山)
| style="background-color:#6ff;" | February 1, 1904<br />Moriyama
| rowspan="2" style="background-color:#6ff;" | July 10, 1941<br />Moriyama
| rowspan="6" style="background-color:#6ff;" | January 15, 1955<br />Moriyama
| rowspan="7" | July 1, 1970<br />Moriyama City
| rowspan="7" | Moriyama
| rowspan="7" | Moriyama
|-
| Kurita D<br />Mononobe (物部) Village
| Kurita D<br />Mononobe
|-
| style="background-color:#9cf;" | Ozu (小津)
| style="background-color:#9cf;" | Ozu
| style="background-color:#9cf;" | Ozu
|-
| style="background-color:#9cf;" | Tamatsu (玉津)
| style="background-color:#9cf;" | Tamatsu
| style="background-color:#9cf;" | Tamatsu
|-
| style="background-color:#9cf;" | Kawanishi (河西)
| style="background-color:#9cf;" | Kawanishi
| style="background-color:#9cf;" | Kawanishi
|-
| style="background-color:#9cf;" | Hayano (速野)
| style="background-color:#9cf;" | Hayano
| style="background-color:#9cf;" | Hayano
|-
| rowspan="2" style="background-color:#9cf;" | Nakasu (中洲)
| rowspan="2" style="background-color:#9cf;" | Nakasu
| rowspan="2" style="background-color:#9cf;" | Nakasu
| style="background-color:#6ff;" | March 1, 1957<br />incorpotation into Moriyama
|-
| style="background-color:#6ff;" | March 1, 1957<br />incorpotation into Chūzu
| rowspan="3" style="background-color:#6ff;" | Chūzu
| rowspan="7" | October 1, 2004<br />Yasu City
| rowspan="7" | Yasu
|-
| style="background-color:#9cf;" | Hyōzu (兵主)
| style="background-color:#9cf;" | Hyōzu
| style="background-color:#9cf;" | Hyōzu
| rowspan="2" style="background-color:#6ff;" | April 1, 1955<br />Chūzu
|-
| style="background-color:#9cf;" | Nakasato (中里)
| style="background-color:#9cf;" | Nakasato
| style="background-color:#9cf;" | Nakasato
|-
| style="background-color:#9cf;" | Yasu (野洲)
| style="background-color:#6ff;" | October 17, 1911<br />Yasu
| rowspan="2" style="background-color:#6ff;" | May 20, 1942<br />Yasu
| rowspan="4" colspan="2" style="background-color:#6ff;" | April 1, 1955<br />Yasu
|-
| style="background-color:#9cf;" | Mikami (三上)
| style="background-color:#9cf;" | Mikami
|-
| style="background-color:#9cf;" | Giō (義王)
| style="background-color:#9cf;" | August 22, 1894<br />rename<br />Giō (祇王)
| style="background-color:#9cf;" | Giō
|-
| style="background-color:#9cf;" | Shinohara (篠原)
| style="background-color:#9cf;" | Shinohara
| style="background-color:#9cf;" | Shinohara
|-
| style="background-color:#9cf;" | Kitasato (北里)
| style="background-color:#9cf;" | Kitasato
| style="background-color:#9cf;" | Kitasato
| colspan="2" | March 3, 1955<br />incorpotation into Ōmihachiman (近江八幡) City
| Ōmihachiman
| Ōmihachiman
|}