Population
277,140
2025
+16.1% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Sussex County, DE: population growth, jobs and income
Sussex County gained 5,907 residents between 2024 and 2025 (+2.2%).
Sussex County had an estimated 277,140 residents in 2025, up 16.1% (38,513 more people) since 2020. That is faster than Delaware as a whole (+6.9%), and the 1st fastest growth of 3 counties in Delaware.
Data as of 2025 · updated
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In the Sussex County report
One-time $99 PDF: everything on this page for Sussex County, ranked against Delaware and the U.S., plus these figures that are not on the free page:
- Median gross rent$1,238/mo2020–24
- Vacant homes, incl. seasonal and second homes29.9%2020–24
- New homes permitted, last 12 months3,6922025-10/2026-09
- Rent growth, 5 yearsIn the report
- Permits in 5+ unit buildingsIn the report
- IRS income moving in (net AGI)In the report
- Neighbouring-county comparison tableIn the report
What's inside: 5 pages
- 1 Summary, headline numbers and ranks (free preview)
- 2 Ranks and the neighbouring-county table
- 3 Migration, with IRS mover and income flows
- 4 Rent, vacant homes, permits and employers
- 5 Every source and the methods
Headline numbers
Net domestic migration
+6,287
2025
22.7 per 1,000 residents
+39,199 in total, 2021–2025
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. People moving in from other U.S. counties minus people moving out.
Unemployment rate
4.7%
2025
+1.1 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
New homes permitted
3,885
2025
−19.1% since 2021
14.0 per 1,000 residents
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
Median household income
$81,497
2020–24
+25.6% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
Private-sector employment
78,541
2023
+8.6% since 2018
Source: U.S. Census Bureau, County Business Patterns, 2023. Paid employees of private employers in mid-March (County Business Patterns).
What the numbers say
Net domestic migration added 6,287 people in 2025: more people moved in from other U.S. counties than moved out.
Private employers had 78,541 paid employees in mid-March 2023, +8.6% since 2018 (County Business Patterns).
Unemployment averaged 4.7% in 2025, 1.1 points higher than in 2019 (before the pandemic).
Builders were authorized to start 3,885 new homes in 2025, or 14.0 per 1,000 residents.
Median household income was $81,497 in the 2020–24 American Community Survey, +25.6% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 72nd.
Part of the Seaford, DE micro area.
Get Sussex County’s next numbers by email
Email me when Sussex County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Sussex County population by year
| Year | Population | Change |
|---|---|---|
| 2025 | 277,140 | +5,907 |
| 2024 | 271,233 | +7,187 |
| 2023 | 264,046 | +7,510 |
| 2022 | 256,536 | +8,635 |
| 2021 | 247,901 | +9,274 |
| 2020 | 238,627 | – |
Census Bureau population estimates, July 1 of each year.
What drove the change in Sussex County
Sussex County grew by 38,513 people since 2020; the largest part came from domestic migration (+39,199).
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | −1,011 | −5,184 | |
| International migrationfrom and to other countries | +639 | +4,319 | |
| Domestic migrationfrom and to other U.S. counties | +6,287 | +39,199 | |
| Census adjustmentbalancing residual | −8 | +179 | |
| Total change | +5,907 | +38,513 |
Census Bureau population estimates, components of change, each year July 1 to June 30. The components add up to the change in the estimate; the Census adjustment is the small balancing figure the Bureau publishes.
How it ranks
| Measure | In Delaware | Among U.S. counties |
|---|---|---|
| Population growth | 1st of 3 | 72nd of 3,107 |
| Net domestic migration per 1,000 residents | 1st of 3 | 85th of 3,108 |
| Private-sector job growth | 3rd of 3 | 815th of 3,092 |
| Median household income | 2nd of 3 | 522nd of 3,107 |
| Lowest unemployment rate | 2nd of 3 | 2,268th of 3,108 |
| New homes permitted per 1,000 residents | 1st of 3 | 53rd of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
Get the county report — $99
The County Growth and Demographics Report for Sussex County, DE as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.
Add 2 neighbouring counties for $50: the Kent County and Wicomico County reports too, $149 for all 3.
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Neighbouring counties
Sussex County grew faster than all 6 of its neighbouring counties (+16.1%, 2020–25).
2 of its 6 neighbouring counties had a higher median household income than Sussex County's $81,497 (2020–24).
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Sussex County, DE This county | 277,140 | +16.1% | 22.7 | 14.0 | $81,497 |
| Wicomico County, MD | 106,899 | +3.2% | −1.6 | 1.6 | $76,210 |
| Kent County, DE | 194,786 | +6.8% | 7.2 | 6.5 | $74,477 |
| Caroline County, MD | 34,116 | +2.5% | 0.1 | 2.2 | $68,457 |
| Worcester County, MD | 54,459 | +3.7% | 6.9 | 4.4 | $81,745 |
| Dorchester County, MD | 33,628 | +3.4% | 14.7 | 1.9 | $61,839 |
| Cape May County, NJ | 93,390 | −1.7% | −1.3 | 9.1 | $91,128 |
Census Bureau population estimates and building permits, American Community Survey 5-year income. Rates per 1,000 residents. – means no figure, or a base too small for a change or rate (it would swing on a few people). A figure from another period shows its year and is left out of the comparison.
Questions
Is Sussex County growing?
Yes. Its population grew 16.1% between 2020 and 2025, about 38,513 more people (Census Bureau population estimates). Delaware as a whole changed +6.9% over the same years. That ranks 1st of 3 counties in Delaware for population growth.
How many people moved to Sussex County?
On net, about 6,287 people in 2025: that many more moved in from other U.S. counties than moved out (Census Bureau net domestic migration estimate).
What is the unemployment rate in Sussex County?
It averaged 4.7% in 2025 (BLS Local Area Unemployment Statistics, annual average).
What is the population of Sussex County?
About 277,140 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
How many jobs are in Sussex County?
Private employers there had 78,541 paid employees in mid-March 2023, +8.6% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
What Beacon CRE covers in Delaware
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Delaware county pages carry the public federal growth figures.
Sussex County data alerts
Email me when Sussex County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Sources and method
- U.S. Census Bureau, Population Estimates Program (Vintage 2025)
- U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics
- U.S. Census Bureau, Building Permits Survey
- U.S. Census Bureau, American Community Survey 5-year estimates
- U.S. Census Bureau, County Business Patterns
Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.
Jobs outside North and South Carolina use County Business Patterns (paid private-sector employees in mid-March); wages and government jobs are not included.