Moving to Castle Rock: Pros, Cons & What to Know
Moving to Castle Rock means moving to the county SEAT of Douglas County -- a real, incorporated home-rule Town with its own elected Council-Manager government since 1987 -- and to a community with a genuine, publicly hikeable namesake rock formation.
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Learn moreA real, full Town government, and county-seat status
Castle Rock has run under a Council-Manager form of government since 1987, with an elected Town Council hiring a Town Manager for day-to-day operations. As the county seat, Douglas County's own government offices sit physically within Castle Rock -- a genuinely different civic role than either unincorporated Highlands Ranch (no city government at all) or incorporated-but-non-seat Parker.
A real population range, and an active-growth profile
One 2026 estimate cites 86,094 residents (up 16.52% since the 2020 Census, still growing ~2.72%/year), while the Town's own site describes "more than 87,000 residents" -- both disclosed rather than picking one. Either way, Castle Rock shares Parker's active-growth profile, a real contrast with built-out Highlands Ranch.
A genuinely different transit reality: no RTD service since 2011
In 2005, Castle Rock voters chose to opt the Town entirely out of the Regional Transportation District (RTD) and its associated sales tax, ending fixed-route RTD transit service in 2011. New residents moving from an RTD-served area, or from Parker specifically, should understand this real, structural difference before assuming any bus/rail option exists locally -- see traffic-transportation.
Colorado's standard new-resident steps apply
New Colorado residents generally need to register a vehicle and obtain a Colorado driver's license within a defined window of establishing residency, through the standard Colorado DMV process, handled through Douglas County given Castle Rock's own status as the county seat.
Key takeaways
- Castle Rock has run under a Council-Manager Town government since 1987 and is the county SEAT of Douglas County -- Douglas County's own government offices sit within Castle Rock.
- Population is cited at 86,094 (up 16.52% since the 2020 Census, per one 2026 estimate) or "more than 87,000" per the Town's own site -- both disclosed.
- Castle Rock voted to opt entirely out of RTD in 2005, ending fixed-route transit service in 2011 -- a real, structural transit difference from Parker specifically.
- New residents follow standard Colorado DMV/driver's-license steps.
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