17603 ZIP Code, Lancaster, PA

17603 is a ZIP code in Lancaster, Pennsylvania in Lancaster County. It covers 30 square miles of land. The closest ZIP codes are 17504, 17601 and 17551. 67,571 people live here in 27,248 households, which puts it among the most populous 1% of Pennsylvania ZIP codes. At about 2,253 people per square mile it has suburban density, and owners and renters are mixed (62% own). Median household income is $77,084, close to the Pennsylvania median of $77,971.

Quick facts

Key figures

MeasureValue
Residents67,571
Households27,248
Median household income$77,084
Income per person$42,414
Median age35.7
Homeowners61.9%
Median home value$262,400
Median rent$1,355
Bachelor's degree or higher37.7%
Average commute (minutes)23.8
Households with kids under 1827.7%
Moved in the past year16.9%
Below the poverty line13.0%
Broadband internet92.4%
Speak a non-English language at home24.0%

Household income

% of householdsValue
<$10K4.5%
$10–15K3.2%
$15–25K5.9%
$25–35K7.5%
$35–50K10.2%
$50–75K16.9%
$75–100K14.2%
$100–150K18.1%
$150–200K10.5%
$200K+9.1%

Age

% of all residentsValue
<1011.6%
10–1913.2%
20–247.8%
25–3416.1%
35–4413.9%
45–549.6%
55–6411.4%
65–749.5%
75+6.9%

Tenure

% of housing unitsValue
Owned, with mortgage38.4%
Owned outright21.6%
Rented35.7%
Vacant4.2%

Type of building

% of housing unitsValue
Detached house34.6%
Townhome36.2%
2–4 units11.7%
5–19 units8.0%
20+ units7.0%
Mobile / other2.4%

Businesses in 17603

1,501 business establishments with 26,331 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

17603 has 47 USPS carrier routes with 27,562 residential and 1,804 business mailboxes. Open the EDDM route map.

Carrier routes in 17603

17603 has 47 USPS carrier routes (40 city (C), 7 rural (R)) with 27,562 residential and 1,804 business mailboxes. Routes range from 269 homes (C093) to 908 homes (C015); the median route has 594 homes. The Census counted 27,248 households in 17603 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–49914
500–74925
750–9998
1,000–1,4990
1,500+0

Best routes in 17603 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C014 — USPS business mailboxes 202, 616 homes
  2. Route C001 — USPS business mailboxes 175, 366 homes
  3. Route C050 — USPS business mailboxes 161, 271 homes
  4. Route C093 — USPS business mailboxes 118, 269 homes
  5. Route C009 — USPS business mailboxes 111, 734 homes

Select these 5 routes on the route map

Every carrier route in 17603

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C001City366175$46,606———
C003City2791$200,001+———
C004City57938$88,775———
C006City86175$30,415———
C007City80326$37,890———
C008City57463$72,746———
C009City734111$49,542———
C012City59515$66,658———
C014City616202$76,757———
C015City9087$72,746———
C016City70843$67,377———
C018City60524$62,906———
C020City41211$87,589———
C024City60929$81,061———
C025City58190$15,173———
C027City37846$200,001+———
C031City6524$70,981———
C035City79774$76,253———
C037City76221$111,855———
C039City40027$95,170———
C042City5731$97,786———
C043City4595$119,375———
C050City271161$62,906———
C052City3326$112,720———
C055City3664$112,720———
C059City5837$70,981———
C062City6773$97,786———
C063City48179$112,720———
C070City70932$15,173———
C071City48871$95,170———
C072City6094$80,257———
C074City3492$112,720———
C080City5731$90,843———
C087City5938$83,740———
C093City269118$62,906———
C097City52142$42,520———
C098City44819$81,061———
C100City7213$87,589———
C102City80437$90,843———
C103City57733$15,173———
R002Rural6769$119,149———
R003Rural8293$97,786———
R006Rural59519$114,190———
R008Rural7258$90,307———
R009Rural59412$119,149———
R012Rural77527$133,765———
R015Rural7468$90,307———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 17603 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

Areas that include 17603

Where it ranks

Mail every home in 17603

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 17603, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 17603 in?
17603 is a Lancaster, PA mailing address. By land area, 8% lies inside Lancaster; the rest is outside any Census-defined city or community.
What county is 17603 in?
17603 is in Lancaster County.
What is the population of 17603?
About 67,571 people (±1,792), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 66,739.
What is the median household income in 17603?
$77,084 (±$3,382), compared with $77,971 for Pennsylvania as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 17603?
47 USPS carrier routes with 27,562 residential and 1,804 business mailboxes (29,366 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 17603?
The closest, measured center to center: 17504 (0.5 mi), 17601 (3 mi, Lancaster), 17551 (4.3 mi, Millersville borough, PA), 17602 (4.6 mi, Lancaster), 17520 (4.7 mi, East Petersburg borough, PA) and 17554 (5 mi, Mountville borough, PA).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.