Estimate your Monroe County property tax with homestead exemptions, by city — and your savings if Amendment 3 passes.
School taxes are 2.95 mills everywhere in Monroe County. County-wide levies add 3.09 mills; cities and unincorporated areas add their own.
| Area | Non-school mills | School mills | Total mills |
|---|---|---|---|
| Unincorporated Monroe County (average) | 3.75 | 2.95 | 6.70 |
| City of Islamorada | 5.74 | 2.95 | 8.69 |
| City of Key Colony Beach | 5.91 | 2.95 | 8.86 |
| City of Key West | 5.05 | 2.95 | 7.99 |
| City of Layton | 5.93 | 2.95 | 8.87 |
| City of Marathon | 5.16 | 2.95 | 8.10 |
One mill = $1 per $1,000 of taxable value. Rates are 2025 levies from the Florida Department of Revenue; some special districts vary inside the county.
Taxable value × millage rate ÷ 1,000. Taxable value is your assessed value minus exemptions. With a homestead, the first $25,000 is exempt from all taxes and an additional exemption (up to $26,411 in 2026) applies to assessed value above $50,000 for non-school taxes.
It uses the 2025 tax rates published by the Florida Department of Revenue for each county and city. Some local special districts and MSTUs vary inside a county, so your real bill can differ by a few percent. Your TRIM notice is the official number.