Dayboro is a town and locality in the Moreton Bay Region, Queensland, Australia. It is approximately 46 kilometres (29 mi) north-northwest of Brisbane, the state capital.

To the north of Dayboro lies the D'Aguilar Range and the mountain township of Mount Mee. Other nearby towns include Petrie and Samford. The land surrounding the town supports avocado and pineapple plantations, as well as dairy cattle.

The Dayboro Rodeo and Dayboro Show usually occur between May and July every year, as well as Dayboro Day, celebrating the town's unique rural heritage so close to the Brisbane CBD.

In the 2011 census, Dayboro recorded a population of 1,692 people, 51.7% female and 48.3% male. The median age of the Dayboro population was 37 years, the same as the national median. 82.4% of people living in Dayboro were born in Australia. The other top responses for country of birth were England 8.4%, New Zealand 2.1%, Scotland 0.8%, Netherlands 0.8%, Germany 0.5%. 96.2% of people spoke only English at home; the next most common languages were 1.1% Dutch, 0.4% German, 0.4% Swedish, 0.2% Yumplatok (Torres Strait Creole).

Dayboro was first known as Hamilton, having been so named after a farmer, Hugh Hamilton, who was appointed Receiving Officer for mail in 1875. In 1892, it became known as Terrors Creek from the creek on which it is situated. The creek and the adjoining area, which became known as Terrors Paddock, derived their names from a grey Arab stallion, Terah, owned in the 1850s by Captain John Griffin of the Whiteside run.

In 1917, however, as the Postmaster General declared that Terrors Creek sounded too much like Torrens Creek, once again, the township acquired a new name. Although the first known inhabitant, John McKenzie, operated a pit sawmill just south of the townsite from 1866, the third and final name selected for Dayboro honours another notable early settler, William Henry Day. Day was Clerk of Petty Sessions and later Police Magistrate in Brisbane. He first selected land in the Dayboro area in the late 1860s and pioneered sugar growing on his extensive properties in the district.

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