Richest ZIP codes in Assumption Parish, LA
These are the 6 ZIP codes in Assumption Parish with the highest median household income, out of 6 with at least 1,000 residents. 70390 (Napoleonville, $58,667), 70380 (Morgan City, $54,595) and 70339 (Pierre Part, $51,659) lead the list. There is no single "best" ZIP code in Assumption County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.
Richest ZIP codes in Assumption County
| Rank | ZIP | Mailing city | Median household income | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 70390 | Napoleonville | $58,667 ±$8,563 | 7,160 | 2,869 | 2,253 |
| 2 | 70380 | Morgan City | $54,595 ±$5,661 | 20,529 | 7,968 | 8,919 |
| 3 | 70339 | Pierre Part | $51,659 ±$15,731 | 4,848 | 2,221 | — |
| 4 | 70372 | Labadieville | $40,659 ±$7,418 | 1,968 | 973 | 977 |
| 5 | 70341 | Belle Rose | $35,346 ±$11,112 | 3,690 | 1,589 | — |
| 6 | 70346 | Donaldsonville | $35,280 ±$14,193 | 9,927 | 3,680 | 4,068 |
How we ranked them
Ranked by median household income (ACS 5-year estimates, 2020–2024). The Census Bureau caps published medians at $250,000; ZIP codes at the cap are shown as $250,000+ and ordered by population. ZIP codes need at least 1,000 residents to be ranked; 6 of 8 qualify.
Which of these to mail, and why
Higher-income ZIP codes suit offers with a bigger ticket: remodeling, pools, roofing, financial planning, private schools, premium dining. A median describes the middle household, not every door, so the routes inside each ZIP still vary.
The top five ZIP codes on this list hold 15,620 households. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 70390 on the EDDM route map
More rankings
- ZIP codes with the highest home values in Assumption County
- ZIP codes with the highest homeownership in Assumption County
- ZIP codes with the most families with kids in Assumption County
- ZIP codes with the most new movers in Assumption County
- Youngest ZIP codes in Assumption County
- Oldest ZIP codes in Assumption County
- Fastest-growing ZIP codes in Assumption County
- All Assumption County ZIP codes
Businesses that mail these ZIP codes
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EDDM guides
Frequently asked questions
- Which ZIP code in Assumption County has the highest median household income?
- 70390 (Napoleonville), at $58,667 (±$8,563), among 6 ZIP codes with at least 1,000 residents.
- How is this ranking calculated?
- Ranked by median household income (ACS 5-year estimates, 2020–2024). The Census Bureau caps published medians at $250,000; ZIP codes at the cap are shown as $250,000+ and ordered by population.
- Why are some ZIP codes missing?
- ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.