{
  "zip": "51637",
  "type": "standard",
  "type_source": "inferred",
  "city": "College Springs",
  "other_place_names": [],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19145",
    "name": "Page County",
    "short_name": "Page"
  },
  "counties": [
    {
      "county_fips": "19145",
      "name": "Page County",
      "short_name": "Page",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 40.620441,
    "lng": -95.118338,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 171,
    "households": 81,
    "housing_units": 85,
    "median_age": 47.2,
    "median_household_income": 72888,
    "median_home_value": 76300,
    "median_rent": null,
    "pct_bachelors_plus": 20.1,
    "mean_commute_min": 34.6,
    "density_per_sqmi": 136.6
  },
  "business": {
    "establishments": null,
    "employees": null,
    "annual_payroll_thousands": null
  },
  "tax": {
    "irs_returns": null,
    "irs_agi_thousands": null
  },
  "area": {
    "land_sqmi": 1.252,
    "water_sqmi": 0
  },
  "nearest_zips": [
    {
      "zip": "51630",
      "miles": 4.2,
      "city": "Blanchard",
      "state": "IA"
    },
    {
      "zip": "51651",
      "miles": 5,
      "city": "Shambaugh",
      "state": "IA"
    },
    {
      "zip": "64445",
      "miles": 5.8,
      "city": "Elmo",
      "state": "MO"
    },
    {
      "zip": "51631",
      "miles": 6,
      "city": "Braddyville",
      "state": "IA"
    },
    {
      "zip": "51636",
      "miles": 6.9,
      "city": "Coin",
      "state": "IA"
    },
    {
      "zip": "51656",
      "miles": 8.2,
      "city": "Yorktown",
      "state": "IA"
    },
    {
      "zip": "64431",
      "miles": 9,
      "city": "Clearmont",
      "state": "MO"
    },
    {
      "zip": "51632",
      "miles": 9.4,
      "city": "Clarinda",
      "state": "IA"
    },
    {
      "zip": "64498",
      "miles": 11.6,
      "city": "Westboro",
      "state": "MO"
    },
    {
      "zip": "51647",
      "miles": 11.9,
      "city": "Northboro",
      "state": "IA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/51637",
    "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."
  }
}