PlainZIP

Keymar, MD

Single-footprint Census roll-up for Keymar, MD: 1 USPS ZIP, population 3,036. 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 KEYMAR-MD · Keymar, MD 1 ZIPs · 3,036 pop · #4375/25278 · Frederick County

INC-HIGH · RANK-TOP · PHOTO-FINISH · BOOK-ONE · OWN-MID · POP-VILLAGE · SPREAD-UNK · HOME-HIGH

  • INC-HIGH $100,500
  • RANK-TOP #4375/25278
  • PHOTO-FINISH ≈ Thurmont
  • BOOK-ONE 1 ZIP
  • OWN-MID 82% owners
  • POP-VILLAGE 3,036
  • SPREAD-UNK Single-ZIP book
  • HOME-HIGH $466,100

Nearest income peer: Thurmont, MD ( $1,644 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 Keymar

Lowest/highest poles plus county-sharing cities nearest Keymar 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, Keymar, MD sits among US cities with an upper-quartile household income, on a village-scale population base, across a single-ZIP footprint.

Top 17%
household income vs 25,278 US cities
3,036
city population (Census)
1
USPS ZIP codes covered
$100,500
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.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $100,500 and home value $466,100 should be read as near-neighborhood numbers ; bachelor's attainment averages 29.5%.

Owner-occupancy sits in a mixed band (82.4%) - check the ZIP page's tenure split before treating Keymar as a pure owner town.

Within Maryland, Gunpowder is the closest lower-income city and Indian Head the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Keymar.

Population concentration

One ZIP, 21757, is all of Keymar

There is no split to weigh here: 21757 holds every one of Keymar's 3,036 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

Mid-pack ZBP load on Keymar's one ZIP

Citywide ZBP: 64 establishments, 457 employees , annual payroll $24,356k (~21 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 21757 (64 units) ; leading NAICS Construction (16) · also Other services (except public administration) · Transportation and warehousing .

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ZIP Codes in Keymar, MD

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

Keymar sits in the lower half of Frederick County on income: Frederick, Mount Airy and New Market report more, and only Emmitsburg reports less. Monrovia marks the far end of that range at $183,571, 83% above Keymar.

ZIP Code Population Median income Establishments Density
21757 3,036 $100,500 64 31
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Keymar 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 Keymar, .