There are currently 15 historic districts within the city of Royal Oak that have been designated by the city commission. The districts are highlighted on the map and listed below with the study reports as compiled by the HDSC and presented linked to the historic district's title*. Historic Districts approved by the city commission become codified and as such part of the Royal Oak Municipal Code Chapter 82:

- Royal Oak Savings Bank Block (at the southwest corner of Fourth and Main Streets and Haberman's Fabric Store at 117 West Fourth Street-originally known as the A.G. Miller Building)*
- Hilzinger Block Building (106-110 South Main Street)
- B&C Grocery Store (417, 419 and 421 South Main Street and 101 East Fifth Street”)
- Royal Oak Woman’s Club (404 South Pleasant Street)*
- McDowall House (402 North Troy Street)
- Orson Starr House (3123 North Main Street)
- George and Anna Hilzinger House (211 Knowles)
- Stauch House (4620 Elmhurst Avenue)
- Hermann’s Bakery (317 South Main Street)
- Baldwin Theater (415 South Lafayette)
- Knowles House (524 East Lincoln Avenue)
- Fleming Goodrich House (319 Crane Avenue)
- L.A. Young Historic District (11 homes on North Altadena Avenue: 1016, 1021, 1036, 1107, 1110, 1111, 1114, 1115, 1118, 1122, 1123)
- Royal Oak Farmers Market (3166 East 11 Mile Road)
- Vinsetta Bridges (Vinsetta Boulevard at Cedar Hill; Woodsboro; Greenleaf; and Mayfield Drives)
*Woman's Club report has not been located as of January 2025.