County profile · New Jersey
Mercer County, NJ market data
How Mercer County compares with other counties for 56 business types: competitors, household spending, official counts and growth.
- Population, 2025
- 399,289
- +3.3% since 2020
- Households
- 144,114
- Median household income
- $100,645
- +24.2% vs. 2015–2019, before inflation
- Median home value
- $377,700
- Jobs located here
- 262,034
- Highest market score
- 84
- HVAC and plumbing, #32 of 1,707 scored counties
A site report maps the competitors on map listings around any address in Mercer County by name and distance, and the households and spending within reach. Or open the report at the center of Mercer County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
Mercer County has an estimated 399,289 people and 144,114 households. Population estimates put the population change in Mercer County from 2020 to 2025 at +3.3%, in step with the U.S. (+3.1%). Median household income in Mercer County is $100,645, 25% above the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 24.2%, before inflation.
Relative to the U.S., household spending in Mercer County runs highest on child care and other personal services (an index of 133, where 100 is the U.S. average) and lowest on gasoline and other fuels (73).
Of the business types scored in Mercer County, HVAC and plumbing companies (84), electricians (80) and home inspectors (79) have the highest Groundwork market scores. For HVAC and plumbing companies, that ranks #32 of 1,707 scored counties.
Mercer County is part of the Trenton-Princeton metro area. Against the U.S., map listings per household run highest for funeral homes (67% above the U.S. rate) and lowest for car washes and detailers (42% below the U.S. rate).
All 56 business types in Mercer County
Highest Groundwork market score first. Each score compares Mercer County with other counties for that business type, from 0 to 100. Spending per listing divides a whole spending line (all vehicle repairs, all eating out) by one type’s listings: the demand for each competitor, not a business’s revenue. Compare it across markets with its index, where 100 is the U.S. figure for the same type; the real estate types, whose line is all housing costs, show the index only. How the score works.
| Business type | Score | Rank among counties | Listings | Per 10k households | Spending per listing | Spending per listing vs. U.S. (100) | Official establishments |
|---|---|---|---|---|---|---|---|
| HVAC and plumbing | 84 | #32 of 1,707 | 78 | 5.4 | $6.7M | 141 | 85 |
| Electricians | 80 | #48 of 1,160 | 34 | 2.4 | $15.4M | 128 | 74 |
| Home inspectors | 79 | #14 of 415 | 8 | 0.6 | Index only | 139 | 6 |
| Pest control | 78 | #36 of 699 | 15 | 1.0 | $14.2M | 138 | 9 |
| Home repair trades | 75 | #106 of 2,057 | 186 | 12.9 | $2.8M | 116 | 200 |
| Convenience stores | 74 | #314 of 2,261 | 98 | 6.8 | $10.8M | 137 | 52 |
| Chiropractors | 72 | #195 of 1,490 | 69 | 4.8 | $2.9M | 120 | 32 |
| Oil change and quick lube | 71 | #53 of 479 | 5 | 0.3 | $24.5M | 178 | 5 |
| Veterinarians | 71 | #256 of 1,485 | 34 | 2.4 | $3.2M | 119 | 27 |
| Mortgage brokers and lenders | 68 | #137 of 887 | 50 | 3.5 | Index only | 149 | 25 |
| Car washes and detailing | 67 | #295 of 1,451 | 32 | 2.2 | $3.8M | 152 | 20 |
| Tire shops | 67 | #343 of 1,530 | 35 | 2.4 | $3.5M | 140 | 17 |
| House cleaning | 65 | #157 of 847 | 25 | 1.7 | $8.5M | 133 | 88 |
| Property management | 65 | #208 of 910 | 44 | 3.1 | Index only | 119 | 67 |
| Fast food and sandwich shops | 65 | #551 of 2,222 | 207 | 14.4 | $3.2M | 105 | 284 |
| Grocery and convenience stores | 65 | #583 of 2,402 | 267 | 18.5 | $4M | 117 | 166 |
| Gyms | 64 | #389 of 1,792 | 111 | 7.7 | $1.6M | 121 | 66 |
| Spas and skin care | 64 | #392 of 1,769 | 125 | 8.7 | $1.3M | 152 | 39 |
| Real estate agents and brokers | 64 | #400 of 2,176 | 389 | 27.0 | Index only | 137 | 88 |
| Pet businesses | 64 | #499 of 2,200 | 115 | 8.0 | $957K | 109 | 69 |
| Pizza | 64 | #513 of 2,090 | 134 | 9.3 | $5M | 98 | 284 |
| Collision repair and body shops | 63 | #365 of 1,327 | 31 | 2.2 | $4M | 128 | 31 |
| Auto repair and car care | 62 | #657 of 2,401 | 374 | 26.0 | $328K | 122 | 177 |
| Yoga, Pilates and fitness studios | 61 | #193 of 777 | 30 | 2.1 | $5.8M | 144 | 66 |
| Clothing and shoe stores | 61 | #651 of 2,087 | 227 | 15.8 | $1.7M | 132 | 130 |
| Gas stations | 61 | #710 of 2,358 | 114 | 7.9 | $2.4M | 100 | 92 |
| Coffee shops and cafes | 60 | #602 of 2,063 | 145 | 10.1 | $4.6M | 124 | 116 |
| Hair salons | 60 | #675 of 2,339 | 309 | 21.4 | $537K | 125 | 136 |
| Urgent care and walk-in clinics | 59 | #105 of 325 | 8 | 0.6 | $24.7M | 101 | 12 |
| Nail salons | 59 | #420 of 1,328 | 73 | 5.1 | $2.3M | 136 | 67 |
| Real estate | 58 | #684 of 2,229 | 491 | 34.1 | Index only | 137 | 210 |
| Optometrists and eye care | 56 | #539 of 1,302 | 77 | 5.3 | $2.6M | 82 | 23 |
| Pet grooming and boarding | 56 | #575 of 1,461 | 43 | 3.0 | $2.6M | 101 | 33 |
| Child care and preschools | 56 | #664 of 1,611 | 127 | 8.8 | $879K | 88 | 110 |
| Auto repair shops | 56 | #899 of 2,378 | 245 | 17.0 | $500K | 112 | 132 |
| Roofing and gutters | 55 | #485 of 1,177 | 74 | 5.1 | $7.1M | 84 | 41 |
| Gyms, studios and classes | 55 | #805 of 2,088 | 246 | 17.1 | $713K | 108 | 156 |
| Clothing, shoes and laundry | 55 | #914 of 2,210 | 340 | 23.6 | $1.1M | 127 | 189 |
| Pet stores | 54 | #414 of 974 | 29 | 2.0 | $3.8M | 84 | 9 |
| Restaurants and cafes | 54 | #1,025 of 2,405 | 1,756 | 121.8 | $379K | 102 | 707 |
| Grocery stores | 53 | #915 of 2,070 | 126 | 8.7 | $8.4M | 90 | 114 |
| Salons, barbers and spas | 53 | #988 of 2,385 | 623 | 43.2 | $266K | 125 | 272 |
| Laundromats | 52 | #355 of 785 | 31 | 2.2 | $12.3M | 98 | 25 |
| Insurance agencies | 52 | #1,046 of 2,272 | 146 | 10.1 | $1.4M | 115 | 89 |
| Funeral homes | 50 | #706 of 1,472 | 50 | 3.5 | $419K | 62 | 25 |
| Lawn, cleaning and pest control | 50 | #862 of 1,771 | 137 | 9.5 | $1.5M | 92 | 345 |
| Dry cleaners | 49 | #272 of 507 | 24 | 1.7 | $15.8M | 101 | 34 |
| Primary care and pediatrics | 49 | #870 of 1,656 | 114 | 7.9 | $1.7M | 97 | 313 |
| Physical therapy | 48 | #781 of 1,422 | 103 | 7.1 | $1.9M | 80 | 62 |
| Bakeries and dessert shops | 48 | #1,009 of 1,889 | 174 | 12.1 | $3.8M | 92 | 131 |
| Sit-down restaurants | 48 | #1,289 of 2,405 | 1,092 | 75.8 | $610K | 92 | 301 |
| Landscaping and lawn care | 47 | #793 of 1,493 | 97 | 6.7 | $2.2M | 75 | 248 |
| Barbershops | 46 | #811 of 1,356 | 95 | 6.6 | $1.7M | 93 | 28 |
| Martial arts and dance studios | 45 | #825 of 1,334 | 105 | 7.3 | $1.7M | 83 | 90 |
| Dentists and orthodontists | 40 | #1,293 of 1,886 | 217 | 15.1 | $911K | 93 | 172 |
| Doctors, dentists and clinics | 40 | #1,687 of 2,394 | 1,380 | 95.8 | $143K | 94 | 614 |
Household spending in Mercer County
What households here spend in a year on each line, in total and per household, with the index against the U.S. average (100).
| Spending line | A year, all households | Per household | Index vs. U.S. (100) |
|---|---|---|---|
| Vehicle maintenance and repairs | $122.5M | $850 | 89 |
| Gasoline and other fuels | $271.5M | $1,884 | 73 |
| Food away from home | $666.1M | $4,622 | 114 |
| Groceries | $1.1B | $7,324 | 116 |
| Personal care products and services | $165.9M | $1,151 | 115 |
| Child care and other personal services | $111.7M | $775 | 133 |
| Memberships, classes and admissions | $175.4M | $1,217 | 124 |
| Medical and dental services | $197.8M | $1,372 | 107 |
| Pets | $110.1M | $764 | 84 |
| Clothing, shoes and related services | $380.1M | $2,638 | 128 |
| Vehicle insurance | $211.2M | $1,466 | 75 |
| Home repairs, maintenance and insurance | $523.8M | $3,635 | 120 |
| Lawn care, cleaning and other household services | $212.3M | $1,473 | 104 |
| Rent and homeowner costs | $2.9B | $20,218 | 121 |
Household spending is estimated from the incomes of the households in each neighborhood, using what households at each income spent nationally in 2024, adjusted for the region. It counts what residents spend, wherever they spend it.
Population and households in Mercer County
- Population, 2025 estimate
- 399,289+3.3% since 2020
- Households
- 144,114
- Median age
- 40.4
- Homes lived in by their owners
- 62%
- Vehicles per household
- 1.6
- Land area
- 225 sq. mi.
- People per square mile
- 1,719
- Median household income
- $100,645+24.2% vs. 2015–2019, before inflation
- Average household income
- $142,372
- Median home value
- $377,700
- Jobs located here
- 262,034
- Daytime population
- 469,892Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Mercer County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the competitors on map listings by name and distance, for any of the 56 business types.
Or open the report at the center of Mercer County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardRelated markets
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Questions
How fast is Mercer County, NJ growing?
Population estimates put Mercer County at 399,289 people in 2025, up 3.3% since 2020, in step with the U.S. (+3.1%). It has 144,114 households. Median household income rose 24.2% from the 2015–2019 survey, before inflation.
How much do households in Mercer County, NJ spend?
Households in Mercer County spend about $2.9B a year on rent and homeowner costs, $1.1B on groceries and $666.1M on food away from home. Set against the U.S., households in Mercer County spend the most on child care and other personal services (an index of 133, where 100 is the U.S. average) and the least on gasoline and other fuels (73).
Which business types have the highest market scores in Mercer County, NJ?
The highest Groundwork market scores in Mercer County are for HVAC and plumbing companies (84), electricians (80) and home inspectors (79). Mercer County ranks #32 of 1,707 scored counties for HVAC and plumbing companies.
How does Mercer County, NJ compare with the U.S.?
The median household income in Mercer County is $100,645 a year, 25% above the U.S. median of $80,734. The population rose 3.3% from 2020 to 2025, against +3.1% for the U.S. The median home value is $377,700, against $332,700 for the U.S. For its number of households, Mercer County has the most map listings, relative to the U.S., for funeral homes (67% above the U.S. rate) and the fewest for car washes and detailers (42% below the U.S. rate).
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. All 56 business types have a score in Mercer County, each ranked against other counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Mercer County. It maps the competitors on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
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Screening a site or an acquisition in Mercer County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of Mercer County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.