{
  "zip": "61231",
  "type": "standard",
  "type_source": "inferred",
  "city": "Aledo",
  "other_place_names": [
    "Preemption",
    "Millersburg"
  ],
  "state": "IL",
  "state_name": "Illinois",
  "county": {
    "fips": "17131",
    "name": "Mercer County",
    "short_name": "Mercer"
  },
  "counties": [
    {
      "county_fips": "17131",
      "name": "Mercer County",
      "short_name": "Mercer",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 41.210699,
    "lng": -90.717768,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "19340",
    "name": "Davenport-Moline-Rock Island, IA-IL",
    "type": "metro",
    "csa_code": "209",
    "csa_name": "Davenport-Moline, IA-IL"
  },
  "demographics": {
    "population": 4962,
    "households": 2128,
    "housing_units": 2317,
    "median_age": 42.2,
    "median_household_income": 70991,
    "median_home_value": 147600,
    "median_rent": 815,
    "pct_bachelors_plus": 25.3,
    "mean_commute_min": 21.3,
    "density_per_sqmi": 32.3
  },
  "business": {
    "establishments": 156,
    "employees": 1696,
    "annual_payroll_thousands": 72026
  },
  "tax": {
    "irs_returns": 2440,
    "irs_agi_thousands": 181285
  },
  "area": {
    "land_sqmi": 153.475,
    "water_sqmi": 0.081
  },
  "nearest_zips": [
    {
      "zip": "61263",
      "miles": 7.4,
      "city": "Matherville",
      "state": "IL"
    },
    {
      "zip": "61486",
      "miles": 7.4,
      "city": "Viola",
      "state": "IL"
    },
    {
      "zip": "61279",
      "miles": 8,
      "city": "Reynolds",
      "state": "IL"
    },
    {
      "zip": "61260",
      "miles": 9,
      "city": "Joy",
      "state": "IL"
    },
    {
      "zip": "61476",
      "miles": 10.2,
      "city": "Seaton",
      "state": "IL"
    },
    {
      "zip": "61276",
      "miles": 10.4,
      "city": "Preemption",
      "state": "IL"
    },
    {
      "zip": "61412",
      "miles": 11.6,
      "city": "Alexis",
      "state": "IL"
    },
    {
      "zip": "61237",
      "miles": 11.8,
      "city": "Buffalo Prairie",
      "state": "IL"
    },
    {
      "zip": "61281",
      "miles": 12,
      "city": "Sherrard",
      "state": "IL"
    },
    {
      "zip": "61465",
      "miles": 12.4,
      "city": "New Windsor",
      "state": "IL"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/61231",
    "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."
  }
}