Tanah Merah is a residential suburb in the City of Logan, Queensland, Australia. It was officially named by the Queensland Place Names Board in 1971. In the 2021 census, Tanah Merah had a population of 4,754 people.

The suburb was first known as part of Slacks Creek. Originally this land was bought and named by the McBride's, an English family who moved to Brisbane from Penang, Malaysia. The land was the first settlement for the McBride family in Australia and subsequently named it Tanah Merah, translating to red soil in Malay. The family were an airforce family who left Malaysia following World War II.

The hill side to the north of the Logan Motorway was once owned by the Murray family who sold it off in sections to developers. The Murray farm still exists in Tanah Merah and is located at the end of Murray's Road. The farm is no longer in use and was sold via auction in 2019.

The population of Tanah Merah expanded significantly between 2001 and 2006 after land to the west of Drews Road was developed into a housing estate.

In the 2011 census, Tanah Merah had a population of 4,608 people, 50.7% female and 49.3% male. The median age of the Tanah Merah population was 33 years, 4 years below the national median of 37. 69.1% of people living in Tanah Merah were born in Australia. The other top responses for country of birth were New Zealand 8.2%, England 4.7%, South Africa 1.2%, Scotland 0.7%, Germany 0.5%. 87.2% of people spoke only English at home; the next most common languages were 1.2% Arabic, 0.7% Mandarin, 0.7% Spanish, 0.5% Hungarian, 0.4% German.

In the 2016 census, Tanah Merah had a population of 4,752 people.

In the 2021 census, Tanah Merah had a population of 4,754 people.