ZIP Code 51001 has segments in 2 Counties (Plymouth, Union).
The ZIP Code maps and database are updated 4 times per year.
Database updated: June 1, 2025, Maps updated:  May 1, 2024.
POPULATION | |
|---|---|
| Total Population | 2,391 (100%) | 
| Population in Households | 2,345 (98.1%) | 
| Population in Families | 1,917 (80.2%) | 
| Population in Group Quarters1 | 46 ( 1.9%) | 
| Population Density | 25 | 
| Diversity Index2 | 21 | 
INCOME | |
| Median Household Income | $71,036 | 
| Average Household Income | $90,618 | 
| % of Income for Mortgage4 | 17% | 
| Per Capita Income | $35,544 | 
| Wealth Index5 | 71 | 
| Socioeconomic Status Index6 | Moderate (57.7) | 
HOUSING | |
|---|---|
| Total HU (Housing Units) | 1,004 (100%) | 
| Owner Occupied HU | 719 (71.6%) | 
| Renter Occupied HU | 217 (21.6%) | 
| Vacant Housing Units | 68 ( 6.8%) | 
| Median Home Value | $186,895 | 
| Average Home Value | $219,075 | 
| Housing Affordability Index3 | 133 | 
HOUSEHOLDS | |
| Total Households | 936 | 
| Average Household Size | 2.51 | 
| Family Households | 619 | 
| Average Family Size | 3.00 | 
GROWTH RATE / YEAR | 
2020-2025 | 2025-2030 | 
|---|---|---|
| Population | 0.64% | 0.16% | 
| Households | 0.50% | 0.00% | 
| Families | -0.62% | |
| Median Household Income | 1.27% | |
| Per Capita Income | 2.19% | |
| Owner Occupied HU | 0.11% | 
The table below compares 51001 to the other 964 ZIP Codes in Iowa by rank and percentile using July 1, 2025 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.
| Variable Description | Rank | Percentile | 
|---|---|---|
| Total Population | # 244 | 75th | 
| Population Density | # 422 | 56th | 
| Median Household Income | # 616 | 36th | 
| Housing Affordability Index | # 601 | 62nd | 
| Per Capita Income | # 701 | 27th | 
| Diversity Index | # 326 | 66th | 
Additional comparisons and rankings can be made with a VERY EASY TO USE Iowa Census Data Comparison Tool.