| Official Name: | Larkspur, Colorado |
| Settlement Type: | Home rule municipality |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Douglas County[1] |
| Government Type: | Home Rule Municipality |
| Established Title2: | Incorporated |
| Established Date2: | 1979[2] |
| Unit Pref: | Imperial |
| Area Footnotes: | [3] |
| Area Total Km2: | 4.12 |
| Area Land Km2: | 4.12 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 1.59 |
| Area Land Sq Mi: | 1.59 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Footnotes: | [4] |
| Population Total: | 206 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | MST |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Coordinates: | 39.2417°N -104.8944°W |
| Elevation Ft: | 6880 |
| Postal Code Type: | ZIP code |
| Postal Code: | 80118 |
| Area Code: | Both 303 and 720 |
| Blank Name: | FIPS code |
| Blank Info: | 08-43550 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2412878 |
| Blank1 Name Sec2: | Major Routes |
| Blank2 Name Sec2: | Former Routes |
Larkspur is a home rule municipality in Douglas County, Colorado, United States. The town population was 206 at the 2020 census. Each year, on weekends in June, July and August, the Colorado Renaissance Festival is held in the hills just west of the town.[5] The town is served by Larkspur Elementary School, a K-6 school in the Douglas County school district.[6] The according to William Bright the town was named for the plains larkspur (Delphinium geyeri).[7]
A post office called Larkspur has been in operation since 1871.[8] The community was named for the abundance of larkspur near the original town site.[9]
Larkspur is also the site of the historic headquarters building of Universal Co-Masonry[10] According to the town's website, Larkspur's Vision Statement is "Larkspur, a small friendly town in Colorado. A town that works together by: Fostering a Government of Integrity that Responds to its People, Directing Future Growth within Larkspur´s Small Town Values, Providing Community Facilities and Activities for All Ages, and Preserving the Natural Environment that is Unique to the Larkspur Area."[11]
Larkspur is located in southern Douglas County in the valley of East Plum Creek. Interstate 25 passes along the eastern edge of the town, with access from Exits 172, 173, and 174. I-25 leads north to Castle Rock, the Douglas County seat, and to Denver, as well as south to Colorado Springs.
According to the United States Census Bureau, the town has a total area of 3.9km2, all land.[12]
The city is Served by I-25. It was once served by SH-18 (now Upper Lake Gulch Road). In addition to the highways, the Colorado Joint Line (which is served by Union Pacific and BNSF) also runs through the town with a large Santa Fe bridge at the south end of town.