Castle Rock is in the Aurora metro area, 25 miles from downtown Aurora, in the eastern part of Colorado. The Colorado state capital, Denver, is 26 miles to the north of Castle Rock. Beyond Aurora, the next major market is Denver at 26 miles to the north. Castle Rock is a smaller community than nearby Parker, which means lower competitive density on local search queries.
Castle Rock has a population of 53,063, ranking 17th of 21 covered Colorado cities and accounting for about 1.8% of their total population. Castle Rock is in the eastern part of Colorado (the Mountain West). Businesses in Castle Rock compete for both Castle Rock-specific searches — where Castle Rock proximity and a complete local profile give them a direct advantage — and for the broader Aurora-area queries where a strong Castle Rock presence can still convert metro-area customers. Douglas County also includes our covered cities of Parker, giving multi-location programs across the county a natural hub.
Nearby covered cities include Parker (48,608), Centennial (106,114), Littleton (44,275) — some of which are larger than Castle Rock's 53,063 residents, meaning lower competitive density for Castle Rock-specific queries. Within Douglas County, we also cover Parker (48,608 residents). The Aurora–Denver corridor (25 mi to 26 mi from Castle Rock) represents the competitive metro backdrop that shapes what Castle Rock businesses need to rank for.
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