OB Flat

{{Use dmy dates|date=September 2022}}

{{Use Australian English|date=March 2013}}

{{Infobox Australian place

| type = suburb

| name = OB Flat

| state = SA

| city = Mount Gambier

| image =

| caption =

| local_map = yes

| zoom = 11

| coordinates = {{coord|37.889341|S|140.773459|E|format=dms|display=inline,title}}

| coord_ref = {{cite web |title=Search results for 'OB Flat, LOCB' with the following datasets being selected - 'Suburbs and Localities', 'Counties', 'Local Government Areas', 'SA Government Regions' and 'Gazetteer' |url= http://location.sa.gov.au/viewer/?map=roads&x=140.8132&y=-37.90116&z=12&uids=19,2,11,20,105&pinx=140.774850&piny=-37.887880&pinTitle=Location&pinText=Ob+Flat,+Locb |website=Location SA Map Viewer|publisher=Government of South Australia|access-date=21 April 2018}}

| pop =

| established = 1860

| established_footnotes = {{cite web |title=Search result for "OB Flat (Locality Bounded)" (Record no SA0051519 with the following layers selected - “Suburbs and Localities”, “County”, “Hundred”, “Place names (gazetteer)”, “Road Labels“ and “Development Plan Layers” |url=http://maps.sa.gov.au/plb/# |work=Property Location Browser |publisher=Government of South Australia |access-date=28 March 2017 |archive-url=https://web.archive.org/web/20161012010923/http://maps.sa.gov.au/plb/ |archive-date=12 October 2016 |url-status=dead }}

| postcode = 5291

| area =

| dist1 =

| dir1 =

| location1 =

| dist2 =

| dir2 =

| location2 =

| lga = District Council of Grant

| lga2 = City of Mount Gambier

|county = Grey

|region=Limestone Coast{{cite web|title=Limestone Coast SA Government region|url=http://www.sa.gov.au/__data/assets/pdf_file/0003/8589/Limestone_Coast_SA_Government_region.pdf|publisher=The Government of South Australia|access-date=10 October 2014}}

| stategov = Mount Gambier{{cite web|title=District of Mount Gambier Background Profile|url=http://www.ecsa.sa.gov.au/component/edocman/?task=document.download&id=569&Itemid=0 |publisher=Electoral Commission SA|access-date=28 March 2016}}

| fedgov = Barker{{cite web|title=Federal electoral division of Barker |url=http://www.aec.gov.au/profiles/sa/files/2011/2011-aec-a4-map-sa-barker.pdf |publisher=Australian Electoral Commission|access-date=28 March 2016}}

| maxtemp = 19.0

| maxtemp_footnotes = {{cite web|title=Monthly climate statistics: Summary statistics MOUNT GAMBIER AERO (nearest weather station) |url= http://www.bom.gov.au/climate/averages/tables/cw_026021.shtml |publisher=Commonwealth of Australia, Bureau of Meteorology|access-date=17 April 2018}}

| mintemp = 8.2

| mintemp_footnotes =

| rainfall = 712.4

| rainfall_footnotes =

| near-n = Mount Gambier

| near-ne = Mount Gambier

| near-e = Yahl
Square Mile
Yahl

| near-se = Caveton

| near-s = Mount Schank
Caveton

| near-sw = Mount Schank

| near-w = Moorak
Mount Schank

| near-nw = Mount Gambier

| footnotes = Locations
Adjoining localities

}}

OB Flat is a south-eastern suburb of Mount Gambier in South Australia.

The name for this suburb is believed to derive from a herd of cattle bearing the brand "OB" (owned by O. Beswick) which once roamed in the area.

OB Flat is located within the federal division of Barker, the state electoral district of Mount Gambier and the local government areas of the District Council of Grant and the City of Mount Gambier. It is also part of Mount Gambier’s urban sprawl.