ZIP Code 37031 has segments in 2 Counties (Sumner, Trousdale).
Businesses Addresses: 53
PO Box Addresses: 99
Residential Addresses: 1,811
Multi-Family Addresses: 0
Single Family Addresses: 1,811
The ZIP Code maps and database are updated 4 times per year. Database updated: March 1, 2026, Maps updated: May 1, 2024.
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Castalian Springs, TN 37031 Data & Demographics
Source: 2020-2024 American Community Survey 5-Year Estimates
POPULATION
Total Population
3,926 (100%)
Population Density
103 per sq mi
Diversity Index1
20
INCOME
Median Household Income
$98,114
Per Capita Income
$44,690
Median Home Value
$352,600
HOUSING
Total HU (Housing Units)
1,804 (100%)
Owner Occupied HU
1,606 (89.0%)
Renter Occupied HU
101 (5.6%)
Vacant Housing Units
97 (5.4%)
HOUSEHOLDS
Total Households
1,707
Average Household Size
2.29
Family Households
1,237 (72.5%)
NOTES
The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).
Castalian Springs, TN 37031 - Peer Comparisons by Rank and Percentile
The table below compares 37031 to the other 33,772 ZIP Codes in the United States by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates 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.
