Underwood is a suburb in the City of Logan, Queensland, Australia. In the 2021 census, Underwood had a population of 6,809 people.

Underwood is situated in the Yugarabul traditional Indigenous Australian country of the Brisbane and surrounding regions. Towards the south-east of Underwood towards Beenleigh is the Bundjalung traditional Aboriginal country.

The origin of the suburb name is from William Underwood, who was an early property owner in the area. William Underwood had established the Commercial Hotel, which operated from the early 1870s through to 1895 on land nearby Beenleigh Road. The suburb Underwood was gazetted on 11 August 1975 and was part of both Brisbane City Council and the former Shire of Albert before the creation of Logan City in the year 1978.

In the 2011 census, Underwood had a population of 5,328 people, 49.9% female and 50.1% male. The median age of the Underwood population was 32 years, 5 years below the national median of 37. 59.6% of people living in Underwood were born in Australia. The other top responses for country of birth were New Zealand 6.3%, China (excludes SARs and Taiwan) 2.3%, England 2.2%, South Africa 1.9% and Korea, Republic of (South) 1.8%. 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.

In the 2016 census, Underwood had a population of 6,341 people. Of these, 50.5% were female and 49.5% were male. The median age of the Underwood population was 33 years, 5 years below the national median of 38. 51.2% of people living in Underwood were born in Australia. 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%. 54.3% of people spoke only English at home; the next most common languages were 8.1% Mandarin, 3.7% Korean, 3.7% Cantonese, 3.5% Punjabi, 2.3% Arabic..

In the 2021 census, Underwood had a population of 6,809 people, 49.5% female and 50.5% male. The median age of the Underwood population was 34 years, 4 years below the national median of 38. 50.7% of people living in Underwood were born in Australia. The other top responses for country of birth were India 6.6%, China (excludes SARs and Taiwan) 4.1%, Korea, Republic of (South) 3.9%, New Zealand 3.6%, Taiwan 2.1%. 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.