PlainZIP

Rocky Ridge, MD

Single-footprint Census roll-up for Rocky Ridge, MD: 1 USPS ZIP, population 1,094. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet ROCKY-RIDGE-MD · Rocky Ridge, MD 1 ZIPs · 1,094 pop · #10529/25278 · Frederick County

INC-HIGH · RANK-MID · BELOW-PEER · BOOK-ONE · OWN-MID · POP-VILLAGE · SPREAD-UNK · HOME-MID

  • INC-HIGH $76,458
  • RANK-MID #10529/25278
  • BELOW-PEER under Emmitsburg
  • BOOK-ONE 1 ZIP
  • OWN-MID 81% owners
  • POP-VILLAGE 1,094
  • SPREAD-UNK Single-ZIP book
  • HOME-MID $382,100

Nearest income peer: Emmitsburg, MD (+ $18,778 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Rocky Ridge

Lowest/highest poles plus county-sharing cities nearest Rocky Ridge on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Rocky Ridge, MD sits among US cities with an above-median household income, on a village-scale population base, across a single-ZIP footprint.

Top 42%
household income vs 25,278 US cities
1,094
city population (Census)
1
USPS ZIP codes covered
$76,458
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

Above-median income on a short ZIP list (1) - lead code 21778 (1,094 residents). Household income $76,458 is the roll-up; open the ZIP for tenure and commute.

Owner-occupancy sits in a mixed band (81.3%) - check the ZIP page's tenure split before treating Rocky Ridge as a pure owner town.

Within Maryland, Corriganville is the closest lower-income city and Capitol Heights the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Rocky Ridge.

Population concentration

One ZIP, 21778, is all of Rocky Ridge

There is no split to weigh here: 21778 holds every one of Rocky Ridge's 1,094 ACS residents. City-level and ZIP-level numbers on this site are the same number twice, check the ZIP page for the income/tenure/commute breakdown.

Census ZBP business roll-up

Sparse ZBP book inside single-ZIP Rocky Ridge

Citywide ZBP: 16 establishments, 125 employees , annual payroll $5,506k (~15 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 21778 (16 units) ; leading NAICS Construction (12) .

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ZIP Codes in Rocky Ridge, MD

These ZIP codes sit in Frederick County, which covers 28 ZIP codes in all; 1 of them fall in Rocky Ridge. See the Frederick County roll-up →

Every one of the 12 cities sharing Frederick County reports a higher average ZIP median income than Rocky Ridge, Frederick, Mount Airy and New Market among them. That gap is the county's income spread, not a measure of the housing or commute picture below. Monrovia marks the far end of that range at $183,571, 140% above Rocky Ridge.

ZIP Code Population Median income Establishments Density
21778 1,094 $76,458 16 24
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Rocky Ridge roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Rocky Ridge, .