ZIP Code 57440 Quick Stats

ZIP Code NameFrankfort
Primary CountySpink County
ZIP Code TypeStandard
Population (2022)506
Area Code(s)605
Current Time
CST

ZIP Code 57440 Map

57440 Demographics

57440 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in South Dakota based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 57440 is White. The majority race/ethnicity attending public schools in 57440 is White. The current unemployment level in 57440 is 1.5%.

Population506
Population Growth Rate-16.85%
Population Density4 People per Square Mile
Total Households148
Percentage High Income Households4.7%
Median Household Income (2021)$53,750
Average Adjusted Gross Income (2021)$247,680
Current Unemployment Rate (November 2024)1.5%
Majority Race/EthnictyWhite - 99.81%
Public School Majority Race/EthnictyWhite - 100.00%

57440 Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White52999.81%
Black00%
Hispanic10.19%
Asian00%
Native American00%
Hawaiian/Pac. Islander00%

57440 Public School Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White65100%
Black00%
Hispanic00%
Asian00%
Native American00%
Hawaiian/Pac. Islander00%

57440 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College178.29%
Bachelor Degree3818.54%
High School Diploma7335.61%
No High School Diploma00%
GED or Alternate115.37%
1 or More Years of College3517.07%
Associates Degree52.44%
Masters Degree2612.68%
Professional Degree00%
Doctorate Degree00%

57440 Schools

57440 Weather and Climate Data

Plant Hardiness ZoneZone 4a: -30F to -25F
Average First Frost DateSeptember 21 - 31
Average Last Frost DateMay 11 - 20
Koppen-Geiger Climate ZoneDfa - Humid Continental Hot Summers
Ecoregion46c - Glacial Lake Basins

57440 Annual Climate Data

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)19213345546057463420732
Avg Max Temp (°F)23304259718087857561412857
Avg Precip (In.).4.541.2322.943.192.952.41.851.65.69.3420.19

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