| State: | FL |
| Type: | SR |
| Route: | 397 |
| Alternate Name: | Eglin Boulevard, John Sims Parkway |
| Map Custom: | yes |
| Length Mi: | 3.199 |
| Length Ref: | [1] [2] [3] |
| Section1: | Southern segment |
| Length Mi1: | 0.899 |
| Direction A1: | South |
| Terminus A1: | in Eglin AFB |
| Junction1: | in Eglin AFB |
| Direction B1: | North |
| Terminus B1: | Eglin AFB gate in Eglin AFB |
| Section2: | Northern segment |
| Length Mi2: | 2.300 |
| Direction A2: | South |
| Terminus A2: | Eglin AFB gate in Valparaiso |
| Junction2: | in Valparaiso |
| Direction B2: | North |
| Terminus B2: | in Niceville |
| Counties: | Okaloosa |
| Previous Type: | SR |
| Previous Route: | 393 |
| Next Type: | SR |
| Next Route: | 399 |
State Road 397 (SR 397) is a 3.199adj=midNaNadj=mid state highway in Okaloosa County, Florida, that runs from Florida State Road 85 on the northern border of Eglin Air Force Base to Florida State Road 85 in western Niceville via Valparaiso. SR 397 is split into two segments by Eglin AFB.