Representative Brian Mast, Republican from Florida

Brian Mast

Florida's 21st congressional district

FL-21 Midterms Intelligence

Brian Mast, an 8-year Republican veteran on Foreign Affairs and Transportation/Infrastructure, represents a security-minded, older coastal district where national defense and water projects resonate. FL-21 is deep red at R+24, but not static: Democrats are at 38.2% and the district has nudged left by about 3 points, suggesting a ceiling on complacency even in a safe seat. The defining electorate is aging and rooted—27.1% are over 65 and homeownership is 78.4%—amplifying pocketbook and property-risk politics.

For advocacy, the leverage is local delivery: frame asks as protecting homeowners and retirees while tying them to infrastructure/water resilience and veterans’ readiness. Mast’s committee lanes reward campaigns that connect district-level benefits to national-security credibility, not partisan grievance. The emerging tension is between a still-dominant GOP baseline and a slow suburban/retiree realignment; coalition work that pairs veteran messengers with cost-of-living or flood-control wins can broaden reach without triggering ideological backlash.

Representative Brian Mast represents Florida's 21st congressional district, serving 812,005 constituents. The district has an estimated median household income of $82,154 and an unemployment rate of 5%.

Economic & Demographic Snapshot

812,005Population
↑ 35,862
$82,154Median Incomenat'l $37,585
↑ $5,880
5%Unemploymentnat'l 3.5%
→ no change
7.1%Poverty Ratenat'l 12.4%
↑ 0.4%
78.4%Homeownershipnat'l 65.5%
→ no change
$1,787Median Rentnat'l $1,163
↑ $221
0.5%Public Transitnat'l 5%
→ no change
28.3 minMean Commutenat'l 26.4 min
↑ 0.8 min

Data sourced from U.S. Census Bureau ACS 5-Year Estimates (2017-2021 vs. 2019-2023). All figures are statistical estimates with 90% confidence level.

Florida District 21 Demographics

Median Age 48.2 (vs 38.5) · Homeownership 78.4% (vs 65.5%) · Bachelor’s+ 36.2% (vs 33.7%) · Poverty 7.1% (vs 12.4%) · Income $82,154 (vs $37,585)

Key Issues for This District
Immigration policyHealthcare accessRent burden

Age Distribution

Skews older than the national average (median age 48.2 vs 38.5 nationally). 20% of residents are 70+. Medicare, Social Security, and healthcare access are top-of-mind.

Race & Ethnicity

White residents are the largest group at 66%. Also significant: Hispanic (18.8%), Black (13.5%).

* Hispanic includes respondents of any race. Racial categories include both Hispanic and non-Hispanic individuals.

Education

36.2% hold a bachelor’s degree or higher, above the 33.7% national average. 8.3% of residents lack a high school diploma.

Income Distribution

Median household income is $82,154, well above the $37,585 national median.

Housing

A homeowner district: 78.4% own their home, well above the 65.5% national average. Median rent is $1,787. Median home value is $412,700.

How People Get to Work

Car-dependent: 72.9% drive alone to work. Average commute is 28.3 minutes.

Source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates
Data represents 5-year statistical estimates for increased reliability.

Florida District 21 FAQ

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Representative Mast focuses on Armed Forces and National Security, International Affairs and Water Resources Development. Deliver personalized constituent letters to Florida's federal, state, and local officials — live in under five minutes.

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