thumb|250px|Nishimatsuura District in Saga Prefecture
is a district located in Saga Prefecture, Japan.
As of April 1, 2021, the district has an estimated population of 18,804 and a density of 286 persons per square kilometre. The total area is .
Towns and villages
- Arita, whose borders are effectively the same as Nishimatsuura District's.
History
{| class="wikitable" style="font-size:88%"
|-
! Before 1889
! April 1, 1889
! 1889 - 1944
! colspan=2 | 1945 - 1959
! 1960 - 1989
! 1989–Present
! Present
|-
!
| bgcolor="#66FFFF" | Imari
| rowspan=3 bgcolor="#66FFFF" | December 8, 1943<br>Imari
| rowspan=12 colspan=2 | April 1, 1954<br>City status gained<br>Imari
| rowspan=12 | Imari
| rowspan=12 | Imari
| rowspan=12 | Imari
|-
!
| bgcolor="#99CCFF" | Ōtsubo
|-
!
| bgcolor="#99CCFF" | Ōkawachi
|-
!
| bgcolor="#99CCFF" | Makishima
| bgcolor="#66FFFF" | December 10, 1928<br>Incorporated into Imari
|-
!
| bgcolor="#99CCFF" | Kurogawa
| bgcolor="#99CCFF" | Kurogawa
|-
!
| bgcolor="#99CCFF" | Ōdake
| bgcolor="#99CCFF" | February 16, 1901<br>Renamed<br>Hatatsu
|-
!
| bgcolor="#99CCFF" | Minamihata
| bgcolor="#99CCFF" | Minamihata
|-
!
| bgcolor="#99CCFF" | Ōkawa
| bgcolor="#99CCFF" | Ōkawa
|-
!
| bgcolor="#99CCFF" | Matsuura
| bgcolor="#99CCFF" | Matsuura
|-
!
| bgcolor="#99CCFF" | Niri
| bgcolor="#99CCFF" | Niri
|-
!
| bgcolor="#99CCFF" | Higashiyamashiro
| bgcolor="#99CCFF" | Higashiyamashiro
|-
!
| bgcolor="#99CCFF" | Nishiyamashiro
| bgcolor="#66FFFF" | April 1, 1936<br>Town status gained, renamed<br>Yamashiro
|-
!
| bgcolor="#66FFFF" | Arita
| bgcolor="#66FFFF" | Arita
| bgcolor="#66FFFF" | Arita
| rowspan=2 bgcolor="#66FFFF" | April 1, 1954<br>Arita
| rowspan=2 bgcolor="#66FFFF" | Arita
| rowspan=4 bgcolor="#66FFFF" | March 1, 2006<br>Arita
| rowspan=4 bgcolor="#66FFFF" | Arita
|-
!
| bgcolor="#99CCFF" | Shin
| bgcolor="#99CCFF" | November 13, 1895<br>Renamed<br>Arita (village)
| bgcolor="#66FFFF" | January 1, 1947<br>Town status gained, renamed<br>Higashiarita
|-
!
| bgcolor="#99CCFF" | Magarikawa
| bgcolor="#99CCFF" | Magarikawa
| rowspan=2 colspan=2 bgcolor="#99CCFF" | April 1, 1955<br>Nishiarita
| rowspan=2 bgcolor="#66FFFF" | April 1, 1965<br>Town status gained<br>Nishiarita
|-
!
| bgcolor="#99CCFF" | Ōyama
| bgcolor="#99CCFF" | Ōyama
|}