Troy is a city in Lincoln County, Missouri, United States.

[8] Fort Cap au Gris, a War of 1812 fortification, was built near Troy in 1814.

Lincoln County Medical Center was established in Troy in 1953 under the Hill-Burton Memorial Hospitals Act, as Lincoln County Memorial Hospital.

Cuivre River State Park, one of the largest of Missouri's state parks, lies approximately three miles to the northeast of Troy, across the Cuivre River valley.

It developed between about 1832 and 1966, and includes representative examples of Late Victorian style architecture.

Notable buildings include the Sherman Cottle House (1832), St. Stephens Methodist Church (1900–1901), Lincoln County Jail/Jailer's House (1876), Sacred Heart Catholic Church (1954), Lincoln County Courthouse (1869–1870), Troy Post Office (c. 1925), Farmers & Merchants Bank / Masonic Lodge (1906), Universalist Church / Masonic Hall (1837/1851), Lincoln County Motor Co. (1929), and United Baptist Church (1937).

[13] The 2020 United States census[14] counted 12,686 people, 4,151 households, and 3,086 families in Troy.

There were 4,455 housing units at an average density of 577.1 per square mile (222.8/km2).

Of all households, 20.2% consisted of individuals and 9.5% had someone living alone who was 65 years of age or older.

There were 4,141 housing units at an average density of 567.3 per square mile (219.0/km2).

24.4% of all households were made up of individuals, and 10.1% had someone living alone who was 65 years of age or older.

There were 2,661 housing units at an average density of 448.1 per square mile (173.0/km2).

26.6% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older.