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Rockingham County, NH — Convenience stores Saturation

How many convenience stores exist per person present — residents plus daytime workers — by ZIP code, compared with the U.S. average. Establishment data: Census ZBP 2023. Population: ACS 2024 5-year. 42 ZIP codes analyzed.

Includes: Convenience stores · Corner stores · Small-format food & fuel marts. Counted together because official statistics use one 445120 code.

Measured density: Range spans bands — 1.11× the U.S. rate (between 1.11× and 2.61× once withheld ZIP cells are counted)

Why a range: Census does not publish a ZIP-by-industry count when that ZIP has 0–2 businesses. 34 ZIP cells in this county are withheld, 27 of them with residents. Each could hold 0, 1, or 2 businesses: counting them all as 0 gives the low end, counting them all as 2 gives the high end — the data cannot say where the truth sits. The density range uses only the populated cells, since ZIPs without residents are excluded from per-person rates. How ranges work

Range spans the U.S. rate   Rockingham County convenience stores — 111–261% of the U.S. rate

40 convenience stores are counted in Rockingham County — 1.0 per 10,000 people present (residents + daytime workers), 111% of the U.S. rate of 0.9.

On the comparable ZIP set (ZIPs with a published count in every year), the total has risen 27% between 2015 and 2023 (22 → 28). That set is smaller than today's county total. 2020–2021 were pandemic-distorted, and Census rounds counts, so small moves are within noise.

Measured supply density is highest in 03874 (Seabrook), 03842 (Hampton), 03079 (Salem) — well above the national rate. On measured density alone, the lowest-density residential ZIPs with a published count are 03038 (Derry), 03801 (Portsmouth), 03833 (Exeter).

Census County Business Patterns (2023) puts the county-wide count at 56 establishments, including locations in ZIP codes that do not map to a ZCTA — so it can run slightly above the sum of the ZIP rows on this page. It is annual, so it lags more than QCEW.

Measured density: Rockingham County sits at 111% of the U.S. rate for convenience stores. 27 ZIPs with population have no published count (each 0–2 businesses), so the true per-capita rate is between 111% and 261% of the U.S. rate. Why. The highest measured density is in 03874 and 03842; the lowest measured density is in 03038 and 03801.

This is a supply-side read: it counts existing convenience stores and the people present, not foot traffic, income, rent, or whether locals want more. Treat low density as a question to check, not an answer.

Convenience stores
40–108
published count; upper bound counts each withheld ZIP cell as 2 (34 cells) (2023)
Per 10,000 present
1.0
residents + daytime workers
U.S. average
0.9
per 10,000 present
County index
1.11×
vs. U.S.
Latest year (CBP)
56
2023 — $6M annual payroll
Residents
319,082
35 ZIPs with data
Workers
150,068
jobs located in county

Is the area growing?

Population
322,433
Census PEP, July 1 2024
Change since 2020
+2.5%
+7,769 people
Net migration 2024
+1,817
international +514, domestic +1,303
Jobs located here
163,015
LODES 2022, +2.8% since 2019

Rockingham County had an estimated 322,433 residents on July 1, 2024 — 2.5% more than in 2020 (+7,769). In the latest year it gained 1,768 people: births minus deaths −57, international migration +514, domestic migration +1,303. Components are published separately and may not sum exactly.

163,015 jobs were located in the county in 2022 (+2.8% since 2019), and 173,042 employed residents lived there (−0.2% since 2019). LODES counts wage and salary jobs covered by unemployment insurance plus federal jobs; it excludes the self-employed and military, and counts jobs rather than unique people. 2019→2022 spans the pandemic, so read it as one change, not a trend.

Population and migration say whether the customer base is growing. They do not say whether people want another business of this type. Definitions and limits →  ·  Full county detail →

ZIP gaining residents
2015–19 → 2020–24
Change
03032 Auburn
+12.4%
03087 Windham
+9.8%
03261 Northwood
+8.1%
ZIP losing residents
2015–19 → 2020–24
Change
03874 Seabrook
−4.9%
03858 Newton
−1.7%

ACS 5-year estimates for 2015–2019 and 2020–2024. Only ZIPs with at least 2,000 residents in both windows and a change larger than the survey margin of error (90%) are listed — small ZIPs move a lot on paper without a real signal.

Nonemployer businesses

Not shown. Census publishes convenience stores only combined with vending machine operators, so a convenience-only nonemployer count is not published.

Census Nonemployer Statistics 2024 (NAICS 2022). We do not approximate this figure.

Saturation map

Each ZIP area is shaded by its density of this business type per person present (residents + workers) vs. the U.S. average. Click any ZIP to zoom to its boundary, see its numbers, and switch to aerial imagery. Individual mapped shops appear as dots at street level — Show locations zooms you in to them (scroll or double-click to zoom).

Basemap:
Under 50% 50–100% 100–150% 150–250% 250%+ 0–2 (not published) / no data ZIP total (dot size) Mapped shop (OpenStreetMap, street level)

Map data © OpenStreetMap contributors, tiles by OpenFreeMap.

White dots are ZIP totals from the official Census count — the bigger the dot, the more convenience stores in that ZIP. They are aggregated, not individual shops. Turquoise dots are individual locations mapped in OpenStreetMap, shown only at street level; they are crowd-sourced and indicative, may be incomplete, and do not equal the official counts. Only the official ZIP totals feed the saturation index.

Market trend — up 27% since 2015

Number of convenience stores in Rockingham County across 2015–2023, on a consistent set of ZIP codes present in every year — so changes are real, not ZIP-boundary artifacts. 2015/2018 are pre-pandemic baselines; 2020/2021 are COVID-distorted.

22
2015
25
2018
21
2020
22
2021
24
2022
28
2023

Highest measured density

ZIP
vs. U.S. average
Index
03874 Seabrook
570%
03842 Hampton
353%
03079 Salem
312%
03077 Raymond
263%
03087 Windham
177%
03833 Exeter
112%
03801 Portsmouth
100%
03038 Derry
85%

Lowest measured density

ZIP
vs. U.S. average
Index
03038 Derry
85%
03801 Portsmouth
100%
03833 Exeter
112%
03087 Windham
177%
03077 Raymond
263%
03079 Salem
312%
03842 Hampton
353%
03874 Seabrook
570%
Low measured density is not evidence of opportunity. A ZIP with few convenience stores may simply lack foot traffic, retail space, or demand. We rank only residential and mixed ZIPs here; employment hubs and visitor destinations are listed separately below. ZIPs where Census did not publish a count (0–2 businesses) are not ranked: they may be the least served of all, but the data cannot tell 0 from 1 or 2. Verify those locally.

All ZIP codes

Click a column header to sort. Index = convenience stores per 10,000 people present (residents + 0.5×workers) ÷ the U.S. average. 100% = exactly average.

ZIPNeighborhood ResidentsWorkersConvenience stores Per 10kIndexStatus
03874Seabrook 8,4876,067 6 5.2 570% Very high density
03842Hampton 16,3244,586 6 3.2 353% Very high density
03079Salem 30,96422,357 12 2.8 312% Very high density
03077Raymond 10,9003,168 3 2.4 263% Very high density
03087Windham 16,0385,015 3 1.6 177% High density
03833Exeter 22,81712,999 3 1.0 112% Above average
03801Portsmouth 23,48440,621 4 0.9 100% Below average
03038Derry 34,4748,343 3 0.8 85% Below average
03032Auburn 6,1192,307 0–2 — — Not published
03034Candia 4,352766 0–2 — — Not published
03036Chester 5,300408 0–2 — — Not published
03037Deerfield 4,714432 0–2 — — Not published
03041East Derry —23 0–2 — — Not published
03042Epping 7,4303,169 0–2 — — Not published
03044Fremont 4,831609 0–2 — — Not published
03053Londonderry 26,32715,179 0–2 — — Not published
03073North Salem —56 0–2 — — Not published
03261Northwood 4,6881,112 0–2 — — Not published
03290Nottingham 5,357230 0–2 — — Not published
03291West Nottingham 09 0–2 — — Not published
03802Portsmouth —190 0–2 — — Not published
03804Portsmouth —83 0–2 — — Not published
03811Atkinson 7,2671,243 0–2 — — Not published
03819Danville 4,471208 0–2 — — Not published
03826East Hampstead 2,654647 0–2 — — Not published
03827East Kingston 3,279383 0–2 — — Not published
03840Greenland 4,1061,955 0–2 — — Not published
03841Hampstead 6,5081,601 0–2 — — Not published
03843Hampton —241 0–2 — — Not published
03844Hampton Falls 2,370430 0–2 — — Not published
03848Kingston 6,2751,409 0–2 — — Not published
03854New Castle 827357 0–2 — — Not published
03856Newfields 2,023467 0–2 — — Not published
03857Newmarket 9,4631,412 0–2 — — Not published
03858Newton 4,836443 0–2 — — Not published
03859Newton Junction —46 0–2 — — Not published
03862North Hampton 4,6102,116 0–2 — — Not published
03865Plaistow 7,8614,231 0–2 — — Not published
03870Rye 5,1881,246 0–2 — — Not published
03871Rye Beach 35688 0–2 — — Not published
03873Sandown 6,628310 0–2 — — Not published
03885Stratham 7,7544,154 0–2 — — Not published

Scroll the table sideways to see all columns.

Find an actual space in Portsmouth

The numbers above tell you how the market looks. To find a specific storefront, these marketplaces list available retail space for lease.

LoopNet
Largest commercial marketplace
Browse Portsmouth retail space →
Crexi
Free listings + market data
Browse Portsmouth retail space →
CityFeet
Retail space for lease
Browse Portsmouth retail space →

Open vacancy data (actual empty units) is only published by some cities; where it exists we show it directly. Listings above are third-party.

Census withholds some ZIP-by-industry cells to protect small businesses. 0–2 means the cell was not published (Census publishes industry counts only at 3+ per ZIP), so the ZIP is left unranked rather than counted as zero. ~ means the count is estimated from the broader industry group and can be off by a business or two.

Follow Rockingham County and convenience stores

When a data vintage changes or a section of this report is revised, we post it to a public update feed. No email address, no account, no tracking — and nothing is sent unless something actually changed.

Subscribe to updates (RSS) How these numbers are built →

Methodology & sources

Establishments. U.S. Census ZIP Code Business Patterns (ZBP 2023), NAICS 445120 — convenience retailers. Counts establishments with paid employees. ZBP is published annually with a ~2-year lag.

Fresh county signal. This industry has no clean QCEW series, so the freshest county signal is Census County Business Patterns 2023: 56 establishments and $6M in annual payroll county-wide. This count includes locations in ZIP codes that do not map to a ZCTA, so it can be slightly higher than the sum of the ZIP rows. CBP is annual and slower than QCEW. It cannot be broken down by ZIP.

Population. U.S. Census American Community Survey 2024 5-year ZCTA population (table B01003). Workers are the ZIP's total employment from the same 2023 ZBP file.

Demand ("people present"). Demand comes from residents and daytime workers: residents + 0.5 × workers. This is the single documented assumption in the model and can be tuned.

Index. index = (ZIP establishments ÷ ZIP demand × 10,000) ÷ the U.S. average for this industry (0.91 per 10,000 present). It is a supply-side density measure; it does not capture income, rent, tourism, or whether locals actually want more.

Read the full methodology →  ·  Data sources & vintages →

BizGapMap — free, no-login small-business saturation reports for major U.S. counties. Built entirely from public U.S. Census, BLS, and IRS data (ZBP 2023, ACS 2024 5-year, PEP 2024, LODES, QCEW, IRS SOI). No forecasts, no revenue guesses — withheld cells are marked, and the few derived counts are labelled as estimates.