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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/91945

91945

ZIP 91945 is in Lemon Grove, California, in San Diego County; area codes 619 and 858; Pacific time. Lemon Grove has 2 ZIP codes; the other is 91946.

Type
Standard
Time zone
America/Los_Angeles
County
San Diego
Population
27,745
Coordinates
32.7331, -117.0341
☼ Live from 91945 — Lemon Grove, CA

Weather right now

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Where 91945 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 91945
  • 🔢 Type 91945 into a pocket calculator and turn it upside down: ShGIG — not quite a word, sorry.
  • ➕ As a number, 91,945 = 5 × 7 × 37 × 71. Its digits add up to 28, a total 1,520 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011100101001
  • 🏠 Its numerical neighbours: 91944 (La Mesa, CA, 2 mi away) and 91946 (Lemon Grove, CA, 1 mi away).
  • 🔄 Backwards, 91945 becomes 54919 — and that is a real ZIP code: Appleton, WI, 1,729 miles away.
  • 👥 22 other ZIP codes are made of exactly the same digits (15949, 19495, 19549, 19945, 19954, 49519, …). The farthest-flung twin is 99514 in Anchorage, AK, 2,453 miles away.
  • 🧭 Farther south than 85% of all ZIP codes, and farther west than 90%.
  • 🎯1,136 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91945 and you would come out at 32.73°S, 62.97°E — 932 miles from Port Louis, Mauritius, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 18m of daylight. Shortest: 10h 00m.
  • 📏 At 4.0 square miles of land, 91945 is bigger than 17% of ZIP codes — room for about 3.0 Central Parks.
🌙 The sky over 91945 today
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🌋 Shake report
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Source: USGS.

People and housing

Population27,745This ZIP27,745
Households9,076This ZIP9,076
Housing units9,416This ZIP9,416
Median age37.1This ZIP37.1California37.9US 38.9
Median household income$88,016This ZIP$88,016California$99,122US $80,734
Median home value$704,900This ZIP$704,900California$734,700US $332,700
Median gross rent$1,896This ZIP$1,896California$2,036US $1,413
Bachelor's degree or higher20.3%This ZIP20.3%
Mean commute29.1 minThis ZIP29.1 min
Population density7,018.7 / sq miThis ZIP7,018.7 / sq mi

Business and tax activity

Business establishments532This ZIP532
Employees6,571This ZIP6,571
Annual payroll$293,218,000This ZIP$293,218,000
Tax returns filed13,450This ZIP13,450
Total adjusted gross income$811,888,000This ZIP$811,888,000

Land area

Land area3.95 sq miThis ZIP3.95 sq mi
Water area0.00 sq mi

Other place names in 91945

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 91945

ZIPCityDistance
91946 Lemon Grove, CA 0.7 mi
92114 San Diego, CA 2.1 mi
91976 Spring Valley, CA 2.2 mi
91979 Spring Valley, CA 2.2 mi
91977 Spring Valley, CA 2.4 mi
91943 La Mesa, CA 2.5 mi
91944 La Mesa, CA 2.5 mi
91941 La Mesa, CA 2.8 mi
92115 San Diego, CA 2.9 mi
91942 La Mesa, CA 3.1 mi

Find every ZIP code within 10 miles of 91945 →

Questions about this ZIP code

Where is ZIP code 91945?

91945 is in Lemon Grove, California, in San Diego County, part of the San Diego-Chula Vista-Carlsbad, CA metropolitan area. Its published point location is 32.7331, -117.0341.

What county is 91945 in?

91945 lies in San Diego County.

What area code is 91945?

Lemon Grove uses area codes 619 and 858, from NANPA's telephone records.

What time zone is 91945 in?

91945 uses America/Los_Angeles.

How many people live in 91945?

About 27,745 people live in ZIP code 91945, in 9,076 households, at 7,018.7 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 91945?

$88,016 a year, against $99,122 across California.

What ZIP codes are near 91945?

The closest are 91946 (0.7 mi), 92114 (2.1 mi), 91976 (2.2 mi), 91979 (2.2 mi) and 91977 (2.4 mi).

Is 91945 a PO Box ZIP code?

91945 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91945 ZIP Code — Lemon Grove, California (San Diego County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91945

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