PlainZIP

Monrovia, MD

Single-footprint Census roll-up for Monrovia, MD: 1 USPS ZIP, population 5,164. 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 MONROVIA-MD · Monrovia, MD 1 ZIPs · 5,164 pop · #353/25278 · Frederick County

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

  • INC-TOP $183,571
  • RANK-TOP #353/25278
  • PHOTO-FINISH ≈ Ijamsville
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 99% owners
  • POP-TOWN 5,164
  • SPREAD-UNK Single-ZIP book
  • HOME-HIGH $632,500

Nearest income peer: Ijamsville, MD ( $1,383 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 Monrovia

Lowest/highest poles plus county-sharing cities nearest Monrovia 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, Monrovia, MD sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 1%
household income vs 25,278 US cities
5,164
city population (Census)
1
USPS ZIP codes covered
$183,571
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 $183,571 and home value $632,500 should be read as near-neighborhood numbers ; bachelor's attainment averages 54.8%.

Owner-occupancy here runs high (98.8%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within Maryland, Ijamsville is the closest lower-income city and Boyds the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Monrovia.

Population concentration

One ZIP, 21770, is all of Monrovia

There is no split to weigh here: 21770 holds every one of Monrovia's 5,164 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

Dense ZBP book packed into Monrovia's one ZIP

Citywide ZBP: 150 establishments, 1,461 employees , annual payroll $82,141k (~29 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 21770 (150 units) ; leading NAICS Construction (40) · also Professional, scientific, and technical services · Retail trade .

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ZIP Codes in Monrovia, MD

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

No other city sharing Frederick County reports a higher average ZIP median income than Monrovia. Frederick, Mount Airy and New Market sit below it, so a household comparing this county on income alone starts here. Emmitsburg marks the far end of that range at $95,236, 48% below Monrovia.

ZIP Code Population Median income Establishments Density
21770 5,164 $183,571 150 181
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Monrovia 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 Monrovia, .