Cost of Living in Key Biscayne, FL
Population 14,560 · Florida · Data vintage 2023
(100 = US avg)
Housing prices in Key Biscayne cluster toward the top of the US distribution — a median of $1.2 million, roughly 4 times the national figure, consistent with markets dominated by nonresident and vacation-home buyers.
Geographically, Key Biscayne sits roughly 6 miles southeast of Miami. Median home values run roughly 161% higher than Miami's $475,000.
Cost Overview
Scale: 100 = US national average. Green < 90, Red > 110.
About the Cost of Living in Key Biscayne
The median home value in Key Biscayne is $1,238,700 — 306% above the national median of $305,000. Median rent runs $3,501/month, 166% higher than the national median of $1,314/month. The median household income of $172,604/year is 131% higher than the US median of $74,580. The local unemployment rate is 3.4%, below the national average of 4.8%. Florida charges no state income tax, a meaningful advantage for take-home pay. The climate averages highs of 82.1°F and lows of 72.6°F. Overall, Key Biscayne has a cost of living index of 350 versus the US average of 100, meaning it is 250% more expensive.
🏠 Housing
HUD Fair Market Rents by Bedroom
💰 Estimated Monthly Budget
Estimates based on median data and national averages. Actual costs vary.
🛒 Food & Groceries
National BLS average prices (2023). Local prices may vary.
🚗 Transportation
Commute Mode
⚡ Utilities
📋 Taxes
💼 Income & Employment
🎓 Education
👥 Demographics
🌤 Climate
NOAA 1991–2020 Climate Normals
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 75 | 77 | 78 | 81 | 84 | 87 | 89 | 89 | 88 | 84 | 80 | 77 |
| Low °F | 64 | 66 | 68 | 72 | 75 | 77 | 80 | 79 | 78 | 76 | 71 | 66 |
| Precip" | 2.33 | 2.27 | 2.03 | 2.56 | 4.62 | 8.72 | 4.20 | 5.85 | 7.35 | 5.96 | 2.61 | 2.45 |
💨 Air Quality
EPA AQS 2023 — county-level monitoring data
Frequently Asked Questions
What is the cost of living in Key Biscayne, FL?
Key Biscayne has a cost index of 350 (100 = national average). It is 250% above the national average.
What is average rent in Key Biscayne, FL?
The median gross rent in Key Biscayne is $3,501 per month based on 2023 Census data.
What is the average home price in Key Biscayne?
The median home value in Key Biscayne is $1,238,700 according to Zillow and Census data.
What is the median income in Key Biscayne?
The median household income in Key Biscayne is $172,604 per year (2023 ACS 5-year estimates).
What is the sales tax in Key Biscayne, FL?
The combined state and local sales tax rate in Key Biscayne is 7.0%. Florida has no state income tax.
Is Key Biscayne, FL affordable?
Key Biscayne is above average in cost of living, with an index of 350 — about 250% higher than the national average.
What is the weather like in Key Biscayne?
Key Biscayne has average high temperatures of 82.1°F and average lows of 72.6°F. Annual precipitation is 51". Data from NOAA 1991–2020 Climate Normals.
Key Biscayne at a Glance
- Population
- 14,560
- Median Income
- $172,604
- Home Value
- $1,238,700
- Median Rent
- $3,501/mo
- Unemployment
- 3.4%
- Avg High Temp
- 82.1°F
- Sales Tax
- 7.0%
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