Android 2019 - 20852 Zip, Zip code 20852 map, housing stats, more for rockville, md, Zip code 20852 is located in central maryland and covers a slightly less than average land area compared to other zip codes in the united states. it also has a large population density. it also has a large population density.. 20852 zip code (north bethesda, maryland) profile - homes, 53% of the 20852 zip code residents lived in the same house 5 years ago. out of people who lived in different houses, 53% lived in this county. out of people who lived in different counties, 50% lived in maryland. 77% of the 20852 zip code residents lived in the same house 1 year ago.. Zip code 5: 20852 - rockville | maryland united states zip, This is the 20852 full zip code page list.its detail is as below. zip stands for "zoning improvement plan". in most cases a zip code is a geographic region with a center point..