[1] It is located 18 km south-east of central Brisbane; the Logan Motorway has made Underwood's boundary.

[3][4] Underwood is situated in the Yugarabul traditional Indigenous Australian country of the Brisbane and surrounding regions.

[7] William Underwood had established the Commercial Hotel, which operated from the early 1870s through to 1895 on land nearby Beenleigh Road.

67.7% of people spoke only English at home; the next most common languages were 4.5% Mandarin, 3.0% Cantonese, 2.2% Korean, 1.7% Arabic and 1.4% Hindi.

The other top responses for country of birth were China 4.7%, India 4.5%, New Zealand 4.3%, Korea, Republic of (South) 3%, Taiwan 2.4%.

50.0% of people spoke only English at home; the next most common languages were 7.8% Mandarin, 6.1% Punjabi, 4.9% Korean, 3.8% Cantonese, and 2.4% Hindi.