Mill Island in Frederick, Maryland presents a yield-led profile with gross yield of 5.3 and prices in line with Frederick and about 1% above Maryland. Prices have moved down 3.6% over the past year, while the Red Flag score of 72 indicates a higher-risk profile. Walkability is 20, and education is in the 84th percentile, so the neighborhood combines a lower mobility score with solid school-score positioning and recent price softness.
AI Summary•Updated May 2026
Area
0.16 mi²
ZIP Code
21701
County
Frederick County
State
Maryland
Redfin — median sale & volumeZillow ZORI — asking rentFEMA National Risk Index v1.20OpenStreetMap — POIFBI UCR — state crimeEPA — radon zonesWashU ACAG — satellite PM2.5US Census ACS / TIGER 2024
Verified Price · Median Sale
$489,587
YoY-3.6%
Gross Rental Yield
5.3%
Listed rent · ZORI annualized
Red Flag Index
High
72 / 100
Walkability Score
20
Minimal
OpenStreetMap POI density · national percentile
Education Score
84 / 100
Excellent · better than 84% of U.S. districts
Pre-pandemic SEDA (2018/19) · district proxy
AI Score
46
Fair
DistrictScore attractiveness · national model
Mill Island Property Prices & Rental Yield
Verified Redfin sale data and Zillow ZORI asking rent for Mill Island, Frederick.
Market Trend (12-Month)
12 Months
$505K$491K$477K$463K$449K
Verified Sale Price (Median)
Jun '25May '26
Verified = Redfin median sale price (MLS). Rolling 3-month series.
Unlock the Mill Island 12-month price trend
See the full Verified vs Listed price history — free with a DistrictScore account.
FEMA National Risk Index composite across eight hazards, plus inherited Maryland crime context.
Red Flag Breakdown
72 / 100
High Risk
Composite is weighted by expected impact — frequent low-damage hazards (hail, wind) weigh less than flood or wildfire.
Flood100Very High
Hurricane80Very High
Heat80Very High
Strong Wind80Very High
Hail80Very High
Earthquake60High
Tornado60High
Wildfire40Moderate
8/8 hazards scored · FEMA NRI v1.20
Crime (state-level): Maryland averaged 24.7 crimes and 4.2 violent per 1,000 residents (-3.8% YoY) in 2024(FBI UCR). Compare the state to the country, not states as a ranking — full Safety & Crime data lives on the state page.
Active transaction volume — 224 homes sold last period
Flood risk is Very High (100/100)
Hurricane risk is Very High (80/100)
Insights are generated from Mill Island's live DistrictScore metrics.
Mill Island Environment & Safety
Satellite PM2.5 air-quality history, FBI UCR crime trend (Maryland-level, the finest official aggregation), EPA radon potential and point-source hazard screening.
Air Quality — PM2.5
2015–2024
6.6 µg/m³ Meets EPA, above WHO guideline-22.8% since 2015
9.57.86.24.5
EPA 9WHO 5
20152024
Annual mean fine-particle (PM2.5) concentration at the Mill Island centroid, satellite-derived (ACAG). References: WHO guideline 5 µg/m³ · EPA annual standard 9 µg/m³. Latest year ranks worse than 70% of U.S. neighborhoods.
Maryland Crime Trend
FBI UCR
31150
20132024
All crimes / 1k
Violent / 1k
Year
Crimes / 1k
Violent / 1k
YoY
2024
24.7
4.2
-3.8%
2023
25.9
4.4
+22.0%
2022
21.4
4.3
+9.1%
2021
19.6
4.3
-0.7%
2020
20.1
4.0
-16.4%
2019
24.1
4.5
—
Reported at the state level — the finest official US crime aggregation; Mill Island inherits the Maryland figures.
Radon Potential
EPA
Zone 1
Zone 1 — Highest potential · Mill Island
EPA radon zones estimate indoor radon potential county-wide (Zone 1 highest, Zone 3 lowest). Testing is recommended in all zones.
Walkability & Amenities in Mill Island
Amenity density and pedestrian access from OpenStreetMap points of interest.
Walkability & Amenities
OpenStreetMap POI
20
Minimal
Walkability Score
0
Grocery
1
Dining
0
Schools
0
Universities
0
Hospitals
0
Pharmacies
3
Parks
0
Rail Transit
0
Coworking
POI counts are amenities within Mill Island's boundary plus a 400 m walk buffer. Rail transit excludes bus stops.
Mill Island vs Frederick vs Maryland
How Mill Island benchmarks against its city and state medians.
Benchmark vs City & State
Across Mill Island, the median sale price sits in line with the median for Frederick neighborhoods and in line with the statewide median. Gross rental yield is 5.3%, against 5.3% for Frederick neighborhoods and 5.5% statewide. Over the past 12 months, prices fell 3.6%. Transaction liquidity sits in line with the median for Frederick neighborhoods and above the statewide median.
Mill Island in Frederick, Maryland has a yield-led profile, with gross yield of 5.3 and prices in line with Frederick and about 1% above Maryland. Prices are down 3.6% over the past year, and the Red Flag score is 72. Walkability is 20, while education is in the 84th percentile.
Neighborhoods near Mill Island
Compare Mill Island with nearby neighborhoods in Frederick.