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AI research, with sources“Castle Rock offers a high-income, fast-growing Denver-adjacent base with strong outdoor access and a polished small-town feel, but retirees should weigh wildfire, property insurance, traffic on I-25, and a real winter season.”
Castle Rock is attractive for active retirees who want newer neighborhoods, golf, and easy access to Denver-area amenities without living in the core metro. The tradeoffs are meaningful, though: housing and insurance costs are high for Colorado, winters can be cold and snowy, and the strongest safety, airport, and healthcare options are spread across the larger Denver region rather than concentrated in town.
Cost of living & taxes Affluent Denver-suburb costs, with relatively high sales taxes and Colorado's flat state income tax.
Castle Rock's 2024 population estimate was 81,415, and Douglas County's 2023 estimate was 383,906, reflecting a high-demand suburban market (Census QuickFacts[1]) (Census QuickFacts[2]). The Town of Castle Rock says its combined sales tax rate is 8.1%, made up of 2.9% state, 1.0% Douglas County, and 4.2% town sales tax, with the 4.2% town rate effective January 1, 2025 (Town FAQ[3]) (Revenue / Sales Tax[4]). Colorado's Department of Revenue states the state sales tax rate is 2.9% and that Colorado generally does not tax services, while the local county and town layers can still apply (Colorado Sales Tax Guide[5]).
Healthcare access Good suburban access to major Denver medical systems, but serious specialty care is mostly regional.
Castle Rock is in Douglas County and part of the Denver metro area, but a verified hospital or drive-time page for a major hospital system is not given here (Douglas County profile[6]) (Census QuickFacts[2]). Douglas County is the county seat and part of the Denver metro area, and retirees commonly rely on larger Front Range systems for advanced specialty care, but a specific hospital drive time is not confirmed here. A plan-specific Medicare Advantage recommendation for Castle Rock is not given here.
Climate & weather Sunny, dry, and four-season, with cool winters and modest precipitation for the Front Range.
A NOAA-based climate summary for Castle Rock reports about 17.6 inches of precipitation annually and 58 inches of snow, with average January nights near 18°F and July afternoons near 86°F (Castle Rock climate chart[7]). The same source says the area gets 74 days with measurable precipitation and about 23 days per year reaching 90°F, which suggests a long shoulder season for outdoor activity but real winter cold (Castle Rock climate chart[7]). For retirees, the comfortable outdoor window is strongest from late spring through early fall, with golf and hiking generally best outside the coldest winter stretches (Castle Rock climate chart[7]).
Crime & safety Castle Rock itself reports much lower violent and property crime than national averages, but FBI reporting is incomplete and trend detail is limited.
For Castle Rock, the FBI Crime Data Explorer summary shows a five-year violent crime rate of 21.6 per 100,000 residents and a property crime rate of 111.3 per 100,000, both below national averages in the source summary (FBI Crime Data summary for Castle Rock[8]). The county-level summary for Douglas County shows a five-year violent crime rate of 57.7 per 100,000 and a property crime rate of 326.4 per 100,000, with the source explicitly noting the county is served by four law enforcement agencies (FBI Crime Data summary for Douglas County[9]). A precise three-year crime trend is not given here.
Housing market Castle Rock’s housing market is expensive and still fairly active for retirees, with 55+ options available in the mid-$600Ks and up.
Castle Rock’s median list price is $725,000 as of September 2026, and Realtor.com reports median days on market at 57 days, which suggests a market that is moving but not instantly. (Realtor.com[10]) Home values in the broader Denver-Aurora-Centennial metro were down 0.46% year over year in FHFA’s 2026Q2 metro series, so the latest official metro benchmark is softer than the city-level listing market. (FHFA[11]) For age-restricted options, Regency at Montaine is a 55+ Castle Rock community with a reported price range from the mid-$600Ks to the mid-$1Ms, and 55places says Castle Rock has several small and medium active-adult communities. (55places[12])
Airport & travel Denver International is the key airport, with strong hub access but a longer suburban drive.
Castle Rock is in Douglas County and part of the Denver metropolitan area, but no FAA or airport page gives an official drive time from Castle Rock to a commercial airport (Census QuickFacts[2]) (Douglas County profile[6]). The nearest major commercial airport is Denver International, but a precise drive time or specific direct-flight list is not given here. That makes the airport picture favorable in principle, but not fully source-confirmed here.
Golf & recreation Strong golf access in the south-metro corridor, plus mountain and trail recreation nearby.
Douglas County is fast-growing and suburban, which supports a strong nearby recreation market, but public golf-course counts within 30 minutes and greens fees are not given here (Douglas County Population & Development Report[13]). The town's Front Range location does, however, place residents within easy reach of hiking, trail systems, and mountain day trips, and the climate supports a long outdoor season with relatively modest precipitation (Castle Rock climate chart[7]). Course names, fees, and membership details are not given here.
Community & demographics Large, affluent, family-heavy suburb with a median age in the late 30s and continued growth.
The Census Bureau reports Castle Rock's 2020 population was 73,158 and its July 1, 2023 estimate was 81,415, showing continued growth (Census QuickFacts[1]). Douglas County's 2020 census profile lists a median age of 39.1 years and notes that the county had 129,862 households and 135,643 housing units (Douglas County 2020 Census Profile[6]). For a retiree, that means Castle Rock is active and well-kept rather than sleepy, with a substantial family-oriented suburban character and likely fewer walk-everywhere urban amenities than a downtown retirement market (Census QuickFacts[1]).
Hazard & air quality Douglas County carries meaningful wildfire and tornado exposure, and local flood insurance can matter by parcel.
A FEMA-related county report for Douglas County says the county has expected natural-hazard property loss of $92.9 million per year and that lightning is the largest single contributor to life-safety loss in that county-level profile (Douglas County risk profile[14]). The Castle Rock ZIP-code climate-risk pages available in the search results note FEMA Special Flood Hazard Area exposure in parts of Castle Rock and indicate flood insurance can be required for some parcels, but those pages are not official FEMA pages and should be treated cautiously (Castle Rock 80109 risk report[15]) (Castle Rock 80108 risk report[16]). Douglas County's official composite score and annual good-air-day count are not given here.
Sources (18)
Numbered sources are the ones cited inline above.
- Census QuickFacts: Castle Rock town, Colorado
- Census QuickFacts: Douglas County, Colorado
- Town of Castle Rock FAQ, sales tax
- Town of Castle Rock Revenue / Sales Tax
- Colorado Department of Revenue, Sales Tax Guide
- Douglas County 2020 Census Profile
- Castle Rock climate summary
- FBI Crime Data summary: Castle Rock, CO
- FBI Crime Data summary: Douglas County, CO
- Realtor.com Castle Rock housing market
- FHFA House Price Index
- Regency at Montaine
- Douglas County Population & Development Report
- Douglas County, CO risk profile
- Castle Rock 80109 climate-risk report
- Castle Rock 80108 climate-risk report
Also consulted, not cited inline.
Cost of living
108.3 cost-of-living index for a retired household (100 = U.S. average) — about 8.3% above the national average for retirees.
| Groceries | 102.5 |
| Housing | 118.2 |
| Utilities | 85.5 |
| Transportation | 95.1 |
| Healthcare | 114.8 |
| Misc. goods & services | 114.1 |
General-population composite: 109.0. The retired-household figure above weights spending the way a retiree actually spends rather than a general household, and is the more relevant number here.
C2ER Cost of Living Index (Expanded Edition), 2026 Q2 (as of 2026).
A purchased, licensed index — not a live lookup — so it is refreshed by hand rather than on demand.
Castle Rock is not tracked separately by C2ER; using Denver CO, in the same metro area (Denver-Aurora-Centennial, CO Metro Area).
Census figures
| Measure | Figure |
|---|---|
| Total population Everyone living here, from the Census Bureau’s rolling five-year survey and controlled to its official population estimate — an average over the five years, not a headcount on one day. Source: Table B01001 on data.census.gov ↗ | 79,123 plus or minus 51 |
| Share of population aged 65+ calculated Residents aged 65 and over as a share of all residents, added up from the survey’s age brackets. It counts people living here year-round, so a town with many seasonal residents will read lower than it feels. Source: Table B01001 on data.census.gov ↗ | 11.4% plus or minus 1.0 percentage points |
| Median household income The midpoint of what households here earned over the twelve months before they were surveyed — half earned more, half less. Not an average, and not per person: a household can be one earner or five. Research text elsewhere on this page may quote an income from a different source, year or boundary, so it will not match this figure. Source: Table B19013 on data.census.gov ↗ | $145,197 plus or minus $7,924 |
| Median home value The midpoint of what owners estimate their own homes are worth, across owner-occupied homes only. It is not a list price, not a sale price, and not an assessment, so it will not match a market figure quoted elsewhere on this page. Source: Table B25077 on data.census.gov ↗ | $652,900 plus or minus $8,994 |
| Median gross rent The midpoint of rent plus tenant-paid utilities across occupied rental homes — what sitting renters pay, not what is being advertised to someone moving in today. Source: Table B25064 on data.census.gov ↗ | $2,000 plus or minus $107 |
| Median real estate taxes paid The midpoint of the property tax actually paid by owner-occupied households, which reflects what they own and any exemptions they hold. It is not the rate a new buyer would pay on a purchase at today’s price. Source: Table B25103 on data.census.gov ↗ | $3,635 plus or minus $107 |
| Owner households spending 30%+ of income on housing calculated Owner households whose monthly housing costs — mortgage, taxes, insurance, utilities — take 30% or more of their income, out of the owner households for which that ratio can be computed. Renters are not in this figure. Source: Table B25091 on data.census.gov ↗ | 21.4% plus or minus 2.7 percentage points |
3 of 7 figures are precise enough to compare with another town. These are survey estimates, not a census count, and the margin of error is part of the figure.
Key details
| Region | CO |
| Airport | DEN - about 40-50 min (major hub) |
| Climate | Semi-arid; ~17.6 in precip, ~58 in snow, ~23 90°F days |
| Lot size | 0.12–0.25 ac low-maintenance lot |
| Home type | 2,000–2,700 sq ft single-family ranch or 2-story |
| Key watch | Wildfire insurance; winter driving on Front Range snow days; traffic on I-25 |
| Healthcare | Regional Denver systems for specialty care; local drive times not verified |
| Best season | May - October |
| Top community | The Meadows, Castle Pines adjacent communities, Founders Village, Terrain, Castle Oaks |
| RegionDescription | Mountain West |
In your free trial: more on Castle Rock
Retirement taxes: Social Security, pensions and IRA withdrawals partly taxed · Typical home: $600K–$850K
- A tax comparison using your income: how Castle Rock's state treats Social Security, IRA and pension income, plus property and sales tax
- Carrying costs and break-even: insurance, HOA, utilities and property tax, and how long until moving pays off
- Example homes in your price range, with live searches on Zillow, Redfin and Realtor.com
- Golf clubs nearby, with membership and initiation costs
- A trip journal for scouting visits, with photos and a PDF report
- Two-home planning: pair Castle Rock with a winter or summer town and see the combined budget
- Any U.S. town researched in about a minute, not just these
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