Zip Code 35603 — Decatur, AL

ZIP Code 35603 is associated with Decatur, AL, in Morgan County. The listed population estimate is 32,179; estimated density is 174.9 people per square mile. Among records with population estimates, it ranks #2 of 8 in Morgan County and #23 of 638 in AL.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (34.537120, -86.967170)

Data MetricLocal Statistic
Postal / Zip Code35603
Primary CityDecatur
State / ProvinceAL
CountyMorgan
Total Population32,179
Population Density174.9 people/sq mi
TimezoneAmerica/Chicago

How 35603 Compares

MetricZIP 35603Morgan County recordsAL records
Population estimate32,179118,974 (sum)5,086,600 (sum)
Population Density174.9 /sq mi----
County population rank#2 of 8----
State population rank#23 of 638----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in AL

ZIP CodeCityDistancePopulation estimate
ZIP 35601Decatur5.3 mi35,449
ZIP 35640Hartselle6.8 mi27,344
ZIP 35649Mooresville7.6 mi81
ZIP 35671Tanner9.0 mi2,267
ZIP 35673Trinity10.0 mi7,250

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →