Thomas River

{{Short description|River in Western Australia}}

{{Use dmy dates|date=April 2025}}

{{Use Australian English|date=March 2015}}

{{Infobox river

| name = Thomas

| native_name =

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| image =

| image_size = 280

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| subdivision_type1 = Country

| subdivision_name1 = Australia

| subdivision_type2 = State

| subdivision_name2 = Western Australia

| subdivision_type3 = Region

| subdivision_name3 = Gascoyne

| subdivision_type4 =

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| length = {{convert|127|km|mi|abbr=on}}

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| discharge1_location= mouth

| discharge1_min =

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| source1 = Teano Range

| source1_location = south of Double Peak

| source1_coordinates= {{coord|24|38|16|S|117|10|13|E|display=inline}}

| source1_elevation = {{convert|463|m|abbr=on}}

| mouth = confluence with the Gascoyne River

| mouth_location = near Landor Station homestead

| mouth_coordinates = {{coord|24|43|33|S|116|15|2|E|display=inline,title}}

| mouth_elevation = {{convert|294|m|abbr=on}}

| progression =

| river_system = Gascoyne River catchment

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| custom_label = National park

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| extra = {{cite web|url=http://maps.bonzle.com/c/a?a=p&p=209285&cmd=sp |work=Bonzle Digital Atlas of Australia |title=Map of Thomas River, WA |year=2008 |access-date=6 February 2009}}

}}

The Thomas River is a river in the Gascoyne region of Western Australia.

The headwaters of the river rise south of Double Peak and flows westwards, joined by two minor tributaries; Coondoondoo Creek and Pink Hills Creek. The river forms its confluence with the Gascoyne River near the Police Station Woolshed. The Thomas flows through the Murrumburra Pool on its way to the Gascoyne. The river descends {{convert|169|m}} over its {{convert|127|km|adj=on}} course.

Significant gold and tin deposits have been found in the Thomas River Gascoyne gold fields.{{cite book|publisher=Australian Bureau of Statistics|title=Year Book Australia, 1910 |year=2009}}