Plainland is a town in the Lockyer Valley Region, Queensland, Australia. In the 2021 census, Plainland had a population of 1,930 people, an increase of 21% from the 2016 census.

Plainland is in the Lockyer Valley, located 75 kilometres (47 mi) west of Brisbane, the state capital, along the Warrego Highway. Laidley–Plainland Road enters from the southwest.

Plainland was settled by a dozen German families in 1878. The families were mostly from West Prussia. The community constructed a Lutheran church in 1884 which was replaced in 1897. About 60 families, mainly of German origin, were living in the area in 1911—serviced by three blacksmiths, the Plainland Hotel, a state school and a general store.

Plainland State School opened circa 1886 and closed in 1966. It was on a 10-acre (4.0 ha) site at 3 Victor Court (27°34′18″S 152°24′58″E / 27.5718°S 152.4162°E / -27.5718; 152.4162 (Plainland State School (former))). Plainland Post Office opened by 1899 (a receiving office had been open from 1887) and closed in 1966. The area received a public bar and hotel in 1905 with the opening of the Plainland Hotel. Schulte's Gourmet Market opened in 1952, selling a range of local meats and produce to this day. The area experienced a general decline in population throughout the mid-20th century, before starting to recover in the late 90's.

The area became the subject of considerable development in the late 90's and early 2000's. Faith Lutheran College opened in 1999. Federal funding led to the construction of a dedicated highway interchange with the Warrego Highway in 2004, which was followed shortly thereafter with the Plainland Plaza development in 2005, which hosts a supermarket amongst other boutique stores. Plainland's highway frontage prompted the development of the Plainland Travel Centre in 2009, which includes truck refuelling and driver facilities, and fast food staples.

Further commercial development remains ongoing, with the opening of other businesses including the region's only Bunnings, as well as ALDI. Porter's Plainland Hotel has also expanded to include an award-winning hotel and function centre, and celebrated 120 years of local business in 2025. Plainland Home + Life acts as the town's second retail centre, hosting larger format stores, medical facilities, and a swimming school. Plainland Plaza is also in the process of undertaking a substantive expansion which will double the size of the shopping centre, including a Coles, town square, and further shopping.

The area has also been the subject of rapid residential growth and development, including the substantive urban real estate development 'Plainland Crossing' being built in stages through the late 2010's, and the almost complete market saturation of closely-held surrounding acreage and lifestyle residential blocks. To support this growing population, Sophia College opened in 2021 with Year 7 enrolments initially, progressively extending the years offered each year until Year 12 becomes available in 2026. In October 2025, the Catholic Church building in Coominya was relocated to become the chapel at Sophia College in Plainland.

In the 2011 census, Plainland had a population of 1,672 people.