Romulus is a city in Wayne County in the U.S. state of Michigan. The population was 23,989 at the 2010 census. Romulus is a western suburb of Metro Detroit and is also considered part of the Downriver collection of communities. It is most notable as the location of the Detroit Metropolitan Airport, a major hub for Delta Air Lines.

The first white settler in Romulus was Samuel Polyne, a French-Canadian, who settled on section 2 in 1826, though he left soon after the township was organized in 1835.

The first settler in the village proper (prior to the 1865 annexation of the whole village and township into one city) was Samuel McMath, who moved from New York state to the area in 1827. He improved land and planned to bring his family to settle there, but he died before he could carry out this plan.

Solomon Whitaker, Charles and Joseph Pulcifer located in the area in 1830, and in 1833, Jenks Pullen and his six sons settled at what became known as "Pullen's Corners" (located in section 19 at the intersection of Ozga and Goddard roads, now commonly called "Five Points"). Pullen's Corners was platted in 1836. The community later took on the name of the township.

The township of Romulus was set off from a part of Huron Township by an act of the Michigan Territorial Council on March 17, 1835, and the first township meeting was held on April 16, 1835, two years before the State of Michigan was admitted in to the Union (1837), in the house of Joseph T. Pullen. The first supervisor was David J. Pullen. The township's name was changed to "Wayne" on March 19, 1845, but was changed back to Romulus on January 16, 1848.

Romulus incorporated as a city in 1970.

The village of Romulus was platted on the Lansing B. Misner estate in 1871.

Romulus was a stop of the Underground Railroad in the 1800s when slaves fled the inhumane conditions of plantations in the South for the free states of the North. There were two stops in Romulus and those structures are still intact to this day.