Castle Rock CO Real Estate A Guide to Living in Castle Rock, Colorado View 333 listings HomeGuidesCastle Rock Castle Rock is a suburb of Denver with a population of 62,417. Castle Rock is in Douglas County and is one of the best places to live in Colorado. Living in Castle Rock offers residents a sparse suburban feel and most residents own their homes. View All Listings Top Neighborhoods to Live in Castle Rock, CO NeighborhoodsMedian Home Price 1. The Meadows $585,000 2. The Terrain $625,000 3. Crystal Valley $600,000 4. Red Hawk $680,000 5. Plum Creek $505,000 6. Castlewood Ranch $510,000 7. Founders Village $480,000 8. Diamond Ridge $1,500,000 9. Sapphire Pointe $600,000 10. Montaine $750,000 11. Macanta $800,000 Guides DenverParkerAuroraLakewoodThorntonArvadaHighlands RanchCastle RockBoulderCommerce City