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US ZIP Code Profile

ZIP Code 35645
Killen, Alabama

ZIP code 35645 is in Killen, located in Lauderdale County, Alabama, within the Florence-Muscle Shoals metro area. Its 2020 Census population was 13,414. The estimated median adjusted gross income per tax return is $55,718, and about 6% of filers report $200,000 or more.

2020 Population
13,414
Census ZCTA
County
Lauderdale
FIPS 01077
Median income (est.)
$55,718
IRS SOI 2022
Land Area
86.285 mi²
+ 6.909 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityKillen, AL
CountyLauderdale County (FIPS 01077)
StateAlabama (FIPS 01)
Metro Area (MSA)Florence-Muscle Shoals, AL Metro Area (22520)
Census Region / DivisionSouth Region · East South Central Division
Coordinates34.90305, -87.50096
Land / Water Area86.285 mi² land · 6.909 mi² water

02Income & Economics

Distribution of the 6,170 individual tax returns filed in 35645 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
25.8%
$25K–$50K
20.8%
$50K–$75K
15.2%
$75K–$100K
12.0%
$100K–$200K
20.4%
$200K+
5.8%
The $200,000+ bracket accounts for 31% of 35645's total adjusted gross income, from 6% of returns — a concentration that drives the gap between the median ($55,718) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 35645's IRS income metrics, 2020–2022.

Median income (2021→2022)
$55,718
▲ 6.2%
Filers earning $200K+
5.8%
▲ 0.5 pt
Total filers
6,170
▲ 1.8%
GET /zipc/v2/zipcodes/35645/soi?year=… $48K 2020 $52K 2021 $56K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 35645 ZCTA.

2000
12,945
 
2010
14,060
▲ +8.6%
2020
13,414
▼ -4.6%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number014580
City AliasesKillen

06Frequently Asked Questions

What county is ZIP code 35645 in?

ZIP code 35645 is in Lauderdale County, Alabama (county FIPS code 01077).

What city is ZIP code 35645?

The primary USPS city for 35645 is Killen, AL.

What metro area (MSA) is 35645 in?

35645 is part of the Florence-Muscle Shoals, AL Metro Area (MSA code 22520).

What is the population of ZIP code 35645?

The 2020 Census population of 35645 was 13,414 residents.

What is the median income in ZIP code 35645?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 35645 is about $55,718, with around 6% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.