{
  "zip": "78666",
  "type": "standard",
  "type_source": "inferred",
  "city": "San Marcos",
  "other_place_names": [
    "Kyle",
    "Redwood",
    "Canyon Lake",
    "Wimberley"
  ],
  "state": "TX",
  "state_name": "Texas",
  "county": {
    "fips": "48209",
    "name": "Hays County",
    "short_name": "Hays"
  },
  "counties": [
    {
      "county_fips": "48209",
      "name": "Hays County",
      "short_name": "Hays",
      "weight": 0.7792,
      "basis": "land_area"
    },
    {
      "county_fips": "48187",
      "name": "Guadalupe County",
      "short_name": "Guadalupe",
      "weight": 0.1573,
      "basis": "land_area"
    },
    {
      "county_fips": "48091",
      "name": "Comal County",
      "short_name": "Comal",
      "weight": 0.0433,
      "basis": "land_area"
    },
    {
      "county_fips": "48055",
      "name": "Caldwell County",
      "short_name": "Caldwell",
      "weight": 0.0202,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 29.881662,
    "lng": -97.984794,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "12420",
    "name": "Austin-Round Rock-San Marcos, TX",
    "type": "metro",
    "csa_code": null,
    "csa_name": null
  },
  "demographics": {
    "population": 88583,
    "households": 33949,
    "housing_units": 36580,
    "median_age": 26.9,
    "median_household_income": 54737,
    "median_home_value": 306700,
    "median_rent": 1319,
    "pct_bachelors_plus": 35.7,
    "mean_commute_min": 25.5,
    "density_per_sqmi": 460.5
  },
  "business": {
    "establishments": 1880,
    "employees": 34315,
    "annual_payroll_thousands": 1555086
  },
  "tax": {
    "irs_returns": 36290,
    "irs_agi_thousands": 2365948
  },
  "area": {
    "land_sqmi": 192.358,
    "water_sqmi": 1.014
  },
  "nearest_zips": [
    {
      "zip": "78655",
      "miles": 10.1,
      "city": "Martindale",
      "state": "TX"
    },
    {
      "zip": "78656",
      "miles": 10.7,
      "city": "Maxwell",
      "state": "TX"
    },
    {
      "zip": "78670",
      "miles": 11.5,
      "city": "Staples",
      "state": "TX"
    },
    {
      "zip": "78667",
      "miles": 12,
      "city": "San Marcos",
      "state": "TX"
    },
    {
      "zip": "78640",
      "miles": 12.5,
      "city": "Kyle",
      "state": "TX"
    },
    {
      "zip": "78130",
      "miles": 13.9,
      "city": "New Braunfels",
      "state": "TX"
    },
    {
      "zip": "78622",
      "miles": 14.1,
      "city": "Fentress",
      "state": "TX"
    },
    {
      "zip": "78623",
      "miles": 14.8,
      "city": "Fischer",
      "state": "TX"
    },
    {
      "zip": "78131",
      "miles": 14.9,
      "city": "New Braunfels",
      "state": "TX"
    },
    {
      "zip": "78135",
      "miles": 14.9,
      "city": "New Braunfels",
      "state": "TX"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/78666",
    "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."
  }
}