{
  "zip": "30557",
  "type": "standard",
  "type_source": "inferred",
  "city": "Martin",
  "other_place_names": [
    "Gumlog",
    "Avalon"
  ],
  "state": "GA",
  "state_name": "Georgia",
  "county": {
    "fips": "13119",
    "name": "Franklin County",
    "short_name": "Franklin"
  },
  "counties": [
    {
      "county_fips": "13119",
      "name": "Franklin County",
      "short_name": "Franklin",
      "weight": 0.6159,
      "basis": "land_area"
    },
    {
      "county_fips": "13257",
      "name": "Stephens County",
      "short_name": "Stephens",
      "weight": 0.3841,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 34.479752,
    "lng": -83.184905,
    "source": "gazetteer_internal_point",
    "timezone": "America/New_York"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 4756,
    "households": 1862,
    "housing_units": 2553,
    "median_age": 39.8,
    "median_household_income": 64722,
    "median_home_value": 185700,
    "median_rent": 867,
    "pct_bachelors_plus": 15.2,
    "mean_commute_min": 27.8,
    "density_per_sqmi": 81.8
  },
  "business": {
    "establishments": 40,
    "employees": 194,
    "annual_payroll_thousands": 8419
  },
  "tax": {
    "irs_returns": 2330,
    "irs_agi_thousands": 153431
  },
  "area": {
    "land_sqmi": 58.167,
    "water_sqmi": 2.634
  },
  "nearest_zips": [
    {
      "zip": "30538",
      "miles": 4.7,
      "city": "Eastanollee",
      "state": "GA"
    },
    {
      "zip": "30553",
      "miles": 6.3,
      "city": "Lavonia",
      "state": "GA"
    },
    {
      "zip": "30577",
      "miles": 9.8,
      "city": "Toccoa",
      "state": "GA"
    },
    {
      "zip": "30521",
      "miles": 10.2,
      "city": "Carnesville",
      "state": "GA"
    },
    {
      "zip": "30516",
      "miles": 11.1,
      "city": "Bowersville",
      "state": "GA"
    },
    {
      "zip": "30520",
      "miles": 11.3,
      "city": "Canon",
      "state": "GA"
    },
    {
      "zip": "29693",
      "miles": 11.3,
      "city": "Westminster",
      "state": "SC"
    },
    {
      "zip": "29643",
      "miles": 12.1,
      "city": "Fair Play",
      "state": "SC"
    },
    {
      "zip": "30598",
      "miles": 12.6,
      "city": "Toccoa Falls",
      "state": "GA"
    },
    {
      "zip": "30639",
      "miles": 13.7,
      "city": "Franklin Springs",
      "state": "GA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/30557",
    "sources_url": "https://zipcodes.pro/sources",
    "license": "Facts derived from US public-domain data (Census, IRS) and GeoNames (CC BY 4.0). Attribution appreciated: zipcodes.pro",
    "note": "A null value means the source did not publish that figure for this ZIP code. It does not mean zero."
  }
}