As a member of the Council-Mayor government, Mullins is home to six city council members and a city administrator. The city is home to a professional fire department, with a student-teacher ratio of 18:1. The town is home to a public library, located at the corner of N. Main and Wine Streets. There are three historical structures located in Mullins, including the A.H. Buchan Company Building, Dillard Barn, and Imperial Tobacco Company Building. The city is also home to the Mullins Commercial Historic District, which includes the Liberty Warehouse, Mt. Olive Baptist Church, Old Brick Warehouse, and the Rasor and Clardy Company Building.
The city's median age was 39.5 in 2019, with foreign-born residents earning an average of 61. While most residents of Mullins are native-born, there are several foreign-born individuals who reside here. Approximately 28% of the population lives below the poverty line, which is higher than the national average of 12.3%. Compared to other cities in South Carolina, Mullins has a higher proportion of foreign-born residents.
The median gross rent in Mullins was $500/mo in 2010. The state average was 29.3%, while neighboring cities of Pamplico and Hope Mills had rent burdens lower than Mullins. Those living in Mullins also paid a higher share of their income for housing. The median household income in Mullins was $74,800 in 2016, which makes it the second-highest in South Carolina.