Lagrange Bay

{{Use Australian English|date=August 2019}}

{{Use dmy dates|date=July 2019}}

{{Infobox Australian place

| type = town

| name = Lagrange Bay

| state = wa

| local_map = yes

| zoom = 10

| coordinates = {{coord|18.68442|S|121.77748|E|display=inline,title}}

| relief = yes

| image =

| caption =

| pop = 617

| pop_year = {{CensusAU|2016}}

| pop_footnotes = {{Census 2016 AUS|id=UCL521004 |name=Bidyadana (La Grange) (L) |accessdate=20 March 2018 |quick=on}}

| postcode = 6725

| elevation =

| dist1 = 190

| dir1 = S

| location1 = Broome, Western Australia

| lga = Shire of Broome

| stategov = Kimberley

| fedgov = Durack

| maxtemp =

| mintemp =

| rainfall =

}}

Lagrange Bay is located {{convert|200|km|mi}} south of Broome, Western Australia in the Kimberley region. It is the site of the Catholic Pallottine La Grange Mission,{{Citation |title=La Grange Mission celebrates its 50th anniversary. |work=Kimberley community profile |date=August 2005 |pages=12–13 }} and the Aboriginal community of Bidyadanga.{{cite web|url=http://www.bidyadanga.crc.net.au/|title=Welcome to the Bidyadanga CRC|publisher=WA Community Resource Network|accessdate=28 April 2011|archive-url=https://web.archive.org/web/20110220145530/http://www.bidyadanga.crc.net.au/|archive-date=20 February 2011|url-status=dead}} It was the location of the La Grange massacre and expedition in 1865.