Lake County, IN ZIP codes

28 ZIP/ZCTAs intersecting this county.

ACS 2023 population

498,990

Median household income

$68,985

Median home value

$214,700

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: County Lake County (GEOID 18089). Methodology

Combined population of ZIP/ZCTAs intersecting this county: 513,166 (28 ZIPs).

Combined population of ZIP/ZCTAs intersecting this county. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census county ACS headline above. Methodology

ZIP/ZCTA overlap with Lake County

Population overlap

Share of each ZIP/ZCTA’s population located within Lake County, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.

46303100.0%
Directory county
4630794.9%
Directory county
46311100.0%
Directory county
46312100.0%
Directory county
46319100.0%
Directory county
46320100.0%
Directory county
46321100.0%
Directory county
46322100.0%
Directory county
46323100.0%
Directory county
46324100.0%
Directory county
46327100.0%
Directory county
4634113.6%
4634296.3%
Directory county
46356100.0%
Directory county
46373100.0%
Directory county
46375100.0%
Directory county
46376100.0%
Directory county
46377100.0%
Directory county
46394100.0%
Directory county
46402100.0%
Directory county
46403100.0%
Directory county
46404100.0%
Directory county
46405100.0%
Directory county
46406100.0%
Directory county
46407100.0%
Directory county
46408100.0%
Directory county
46409100.0%
Directory county
46410100.0%
Directory county

ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

ZIP codes intersecting Lake County

ZIP	City	County	Population	Income
46303	Cedar Lake	Lake County	16,910	$78,659
46307	Crown Point	Lake County	71,418	$102,118
46311	Dyer	Lake County	23,405	$109,167
46312	East Chicago	Lake County	26,158	$41,071
46319	Griffith	Lake County	17,683	$75,976
46320	Hammond	Lake County	14,097	$35,706
46321	Munster	Lake County	23,733	$105,764
46322	Highland	Lake County	23,749	$76,219
46323	Hammond	Lake County	23,184	$56,906
46324	Hammond	Lake County	21,433	$61,118
46327	Hammond	Lake County	10,797	$50,457
46341	Hebron	Porter County	10,169	$99,444
46342	Hobart	Lake County	32,525	$72,163
46356	Lowell	Lake County	19,396	$87,535
46373	Saint John	Lake County	18,509	$123,203
46375	Schererville	Lake County	24,012	$89,646
46376	Schneider	Lake County	280	$68,750
46377	Shelby	Lake County	31	—
46394	Whiting	Lake County	12,141	$66,386
46402	Gary	Lake County	5,636	$29,125
46403	Gary	Lake County	10,697	$44,114
46404	Gary	Lake County	16,846	$39,188
46405	Lake Station	Lake County	11,509	$57,005
46406	Gary	Lake County	8,513	$35,631
46407	Gary	Lake County	8,889	$25,551
46408	Gary	Lake County	15,571	$47,063
46409	Gary	Lake County	7,072	$40,637
46410	Merrillville	Lake County	38,803	$61,735

USPS associates these ZIPs with Lake County

These codes list Lake County as a primary or acceptable city. They are not used for the ACS headline.

ZIP	City	County	Population	Income
46308	Crown Point	Lake County	519	—
46325	Hammond	Lake County	429	—
46355	Leroy	Lake County	129	—
46401	Gary	Lake County	533	—
46411	Merrillville	Lake County	743	—