Lake Altham

{{Short description|Lake in Western Australia}}

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

{{Use dmy dates|date=May 2023}}

{{Infobox body of water

| name = Lake Altham

| image =

| caption =

| pushpin_map = Australia Western Australia

| pushpin_map_alt =

| pushpin_label_position = top

| pushpin_map_caption = Location in Western Australia

| image_bathymetry =

| caption_bathymetry =

| location = Great Southern, Western Australia

| coords = {{coord|33|23|57.3|S|118|26|31.5|E|type:waterbody_region:AU|display=inline,title}}

| type = Wetland

| inflow =

| outflow =

| catchment =

| basin_countries = Australia

| length =

| width =

| area = {{convert|2.4|km2|abbr=on}}

| depth =

| max-depth =

| volume =

| residence_time =

| shore =

| elevation =

| islands =

| cities =

| reference = {{Gazetteer of Australia | name = Lake Altham | id = 260571}}

| embedded={{Infobox mapframe

|stroke-colour=#C60C30

|stroke-width=3

|marker=water

|marker-colour=#1F2F57

|zoom=10

}}

}}

Lake Altham, part of the Lake Grace System, is a wetland located in the Great Southern region of Western Australia. Situated in the Shire of Kent, the lake is part of the Western Mallee subregion of the Mallee region.{{cite web | author1 = Beecham, Brett |author2=Danks, Alan | title=Mallee 2 (MAL2 – Western Mallee subregion) | work=A Biodiversity Audit of Western Australia's 54 Biogeographical Subregions in 2002 | publisher=Department of Conservation and Land Management | url=http://www.naturebase.net/pdf/science/bio_audit/mallee02_p435-465.pdf | accessdate=24 February 2007}} It has an area of about {{convert|2.4|km2}} and is one of four lakes in the area comprising a DIWA-listed wetland of national importance.{{Australian Wetlands Database | name = Lake Grace System | code = WA055}}

Lake Altham, except for a small section in its north, is part of the Chinocup Nature Reserve, gazetted on 20 January 1967 and has a size of {{convert|198.25|km2|mi2}}.{{cite web |url=https://nationalmap.gov.au/ |title=NationalMap |author= |date= |website=nationalmap.gov.au |publisher=Geoscience Australia |access-date=8 November 2024 |quote=}}{{cite web |url=https://www.dcceew.gov.au/sites/default/files/documents/capad2022-terrestrial-wa.xlsx |title=Terrestrial CAPAD 2022 WA summary |author= |website=www.dcceew.gov.au/ |publisher=Department of Climate Change, Energy, the Environment and Water |access-date=14 November 2024}}