Donnybrook is a city in Ward County, North Dakota, United States. The population was 59 at the 2010 census. It is part of the Minot Micropolitan Statistical Area.
The first place named Donnybrook was founded in 1895 and named after Donnybrook Fair in Ireland. In 1897, the postmaster of this site changed the name to Goetz. The name Donnybrook was then reused in 1898 when a new town formed to the west of Goetz along the main line of the Soo Line Railroad.
Donnybrook is located at 48°30′36″N 101°53′7″W (48.510014, -101.885410). According to the United States Census Bureau, the city has a total area of 0.70 square miles (1.81 km2), all land.
As of the census of 2010, there were 59 people, 29 households, and 18 families residing in the city. The population density was 84.3 inhabitants per square mile (32.5/km2). There were 37 housing units at an average density of 52.9 per square mile (20.4/km2). The racial makeup of the city was 96.6% White and 3.4% from two or more races.