{ "dataset": "census-zcta-county", "version": "2026-10", "title": "2020 ZCTA to County Relationship File (U.S. Census Bureau)", "publisher": "U.S. Census Bureau", "sourceUrl": "https://www.census.gov/geographies/reference-files/time-series/geo/relationship-files.2020.html", "terms": { "url": "https://www.census.gov/about/policies/citation.html", "section": "Public-Use Statement", "text": "Proper citation ensures that Census Bureau statistical products and research can be discovered, reused, replicated for verification, and credited for recognition to measure usage and impact. Data users who create their own estimates using data from disseminated tables and other data should cite the Census Bureau as the source of the original data only. Conclusions drawn from any analysis of these data are the sole responsibility of the performing party.", "captured": "2026-10-31" }, "redistributionBasis": { "kind": "public domain", "note": "U.S. federal government work (17 U.S.C. 105); the Census page above states no license, so the matcher's advisory reads derive" }, "posture": "mirror", "postureAdvisory": { "posture": "derive", "license": null, "reason": "terms absent or unrecognized; values are facts we may compute over", "agrees": false }, "license": "public domain (U.S. federal government work (17 U.S.C. 105); the Census page above states no license, so the matcher's advisory reads derive)", "attribution": "Source: U.S. Census Bureau, 2020 ZCTA to County Relationship File.", "asOf": "2021-12-09", "retrieved": "2026-10-31", "generatedAt": "2026-10-31T00:00:00Z", "cadence": { "every": "annual", "nextRelease": { "date": "2031-12-31", "posted": false, "note": "Relationship files follow each decennial census; the 2030 file is not expected before late 2031" } }, "raw": [ { "url": "https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_county20_natl.txt", "name": "tab20_zcta520_county20_natl.txt", "bytes": 6821287, "sha256": "3ed41278d637dc249e0323306f68be8a6c234e3090f4de88ef328dee71aeaaaf" } ], "ceiiScreen": { "rule": "18 CFR 388.113", "screened": "2026-10-31", "infrastructure": false, "columnsChecked": 8, "flagged": [], "unconfirmed": [], "passed": true, "note": "Census statistical areas and their land overlap; no facility or network data." }, "tables": [ { "name": "zcta_counties", "title": "ZCTAs and the counties they share land with, with each county's share", "dataPeriod": "2020", "rows": 46953, "changes": { "first": true }, "columns": [ { "name": "zcta", "type": "str" }, { "name": "county_fips", "type": "str" }, { "name": "county_name", "type": "str" }, { "name": "state", "type": "str" }, { "name": "state_fips", "type": "str" }, { "name": "land_part_m2", "type": "f64", "unit": "square meters" }, { "name": "zcta_land_m2", "type": "f64", "unit": "square meters" }, { "name": "share_of_zcta_land", "type": "f64", "unit": "fraction" } ], "partition": "state", "shards": [ { "path": "zcta_counties/AK.bin", "state": "AK", "rows": 258, "bytes": 15264, "sha256": "0c0084a31ff6fbc4cfdfe1a3ff2caa2df5e44605d502c8273da12913230f0c53" }, { "path": "zcta_counties/AL.bin", "state": "AL", "rows": 979, "bytes": 50976, "sha256": "71f1f6d0fa03dd53c037a7062d161eb2b8343725fa28246032d8feb59d02a2f1" }, { "path": "zcta_counties/AR.bin", "state": "AR", "rows": 922, "bytes": 48344, "sha256": "8ed7c9c749f7aa2a0ac91feb28254597a2541233d0072cbce25e43a3657d8880" }, { "path": "zcta_counties/AS.bin", "state": "AS", "rows": 4, "bytes": 1208, "sha256": "f3662b0da48b045ec68038851d53ea0ad1beefe0378a5016e65ae47e933178fc" }, { "path": "zcta_counties/AZ.bin", "state": "AZ", "rows": 465, "bytes": 25160, "sha256": "ab00439805202b38a019cdf07083323cc76b6f89caa0e1939a489ea3c61fd97b" }, { "path": "zcta_counties/CA.bin", "state": "CA", "rows": 1995, "bytes": 104704, "sha256": "76ae7d44a0de036beb0929eea457aece052a5640c260f2ce0cd4378581f42c18" }, { "path": "zcta_counties/CO.bin", "state": "CO", "rows": 713, "bytes": 38184, "sha256": "1cde1fefb62502e0788eda22ccf4c19ae3740d8e7d98b908035eff44f3a8244d" }, { "path": "zcta_counties/CT.bin", "state": "CT", "rows": 299, "bytes": 16640, "sha256": "9fd1c8b9bc4b183e51e71390c0b24accd6ffb0554640b933bd6c38c5ded5cb4d" }, { "path": "zcta_counties/DC.bin", "state": "DC", "rows": 57, "bytes": 3952, "sha256": "94c536b277480f888ccaab56301bb82fcf8cc3d11d2f884430a501be70f9f07a" }, { "path": "zcta_counties/DE.bin", "state": "DE", "rows": 75, "bytes": 4888, "sha256": "cc88040637f1791c8dda8f31bb25de5808d0e7a778091a5649fb03fa88d36f98" }, { "path": "zcta_counties/FL.bin", "state": "FL", "rows": 1174, "bytes": 62392, "sha256": "4eaf9a434d72746a4e502a711064b8bfed8393ca9bba57d2e694a5e9d68ce18d" }, { "path": "zcta_counties/GA.bin", "state": "GA", "rows": 1333, "bytes": 69544, "sha256": "9db4e93ba4a7833d6786a2d974626c553276e8b6f8bd3349e1b4df2a3fe4bb92" }, { "path": "zcta_counties/GU.bin", "state": "GU", "rows": 7, "bytes": 1320, "sha256": "f5e85f1c6ff37c13de8010a2a0d1906add04227698fda7388031fbb8a69d95bc" }, { "path": "zcta_counties/HI.bin", "state": "HI", "rows": 97, "bytes": 6120, "sha256": "076d18b64828ad0178348e91ff05041c556c16cd7bdda34274822dc809f5ef36" }, { "path": "zcta_counties/IA.bin", "state": "IA", "rows": 1572, "bytes": 80352, "sha256": "a79819b67205eb30439d77fe61825de3ffff01cb4d2bdce9712f6141404b0ed7" }, { "path": "zcta_counties/ID.bin", "state": "ID", "rows": 386, "bytes": 21312, "sha256": "3ca28dc4027d3630c4aff4aba65afe170e7c993eef0771eca5a9b5b07d411afa" }, { "path": "zcta_counties/IL.bin", "state": "IL", "rows": 2002, "bytes": 102744, "sha256": "8618317649afdf41b9e58c3f3d5ea0e259494df486b31f0ff810708e27b4019e" }, { "path": "zcta_counties/IN.bin", "state": "IN", "rows": 1302, "bytes": 66968, "sha256": "33922650fa2d3a6a89d50863f251493df4a72f888d46621342fa84712d5507c3" }, { "path": "zcta_counties/KS.bin", "state": "KS", "rows": 1154, "bytes": 59984, "sha256": "42ac8fa720d1906f81144d2f96f9b9c1223f3a0137a1b5c66924880241dd987d" }, { "path": "zcta_counties/KY.bin", "state": "KY", "rows": 1193, "bytes": 62672, "sha256": "d231b29e769a5bbb9cea7e71455af5721227e8f65a90090ad41b680ba42fd49f" }, { "path": "zcta_counties/LA.bin", "state": "LA", "rows": 728, "bytes": 39048, "sha256": "ed38d0a90f6b67cbd0b67ddae11854e10b115c2c507c5a714bd43cdbbeff5766" }, { "path": "zcta_counties/MA.bin", "state": "MA", "rows": 565, "bytes": 30512, "sha256": "c506341870054ef02c97e2aa6a04c0d540ced9b05f45a28aae280887cb1d73fd" }, { "path": "zcta_counties/MD.bin", "state": "MD", "rows": 563, "bytes": 30200, "sha256": "b28c3f7a5f04515f44cee00f86b99ce38cfdf05fb08359fe9bab1fe0cf05661b" }, { "path": "zcta_counties/ME.bin", "state": "ME", "rows": 443, "bytes": 24296, "sha256": "6f79ecc5895ce105e0c3283bc085fe005f6428447128965ca5294d747e254008" }, { "path": "zcta_counties/MI.bin", "state": "MI", "rows": 1431, "bytes": 73976, "sha256": "b0f0637d76fdb21e856bee62bd60155e283a85b4a59ccf1e45c555584c4970d5" }, { "path": "zcta_counties/MN.bin", "state": "MN", "rows": 1359, "bytes": 70056, "sha256": "6baf695e2f725a4367ee150ad00a4bdd2dd3b815352e0f881d0ce2f83a1e5f5b" }, { "path": "zcta_counties/MO.bin", "state": "MO", "rows": 1640, "bytes": 84280, "sha256": "862a57195971239850fcd570faf581f95b394ec4af53d1c6a11f48849b766d0d" }, { "path": "zcta_counties/MP.bin", "state": "MP", "rows": 3, "bytes": 1184, "sha256": "515959a571d12288f1e63ab772b095655339e952d1ca26e4aedf920f9569e28a" }, { "path": "zcta_counties/MS.bin", "state": "MS", "rows": 771, "bytes": 40376, "sha256": "8948adf79317954328e72613d359a548b96817650b5adc966f575b020f02c45d" }, { "path": "zcta_counties/MT.bin", "state": "MT", "rows": 517, "bytes": 28152, "sha256": "b3dd7896693c9de2707d91d7bc8718c39ddaa4cf8f6be582984400cb73e0a73f" }, { "path": "zcta_counties/NC.bin", "state": "NC", "rows": 1292, "bytes": 67120, "sha256": "acf069604d8e0922985826207b33e6f4f91fce8b73ad318cfac2c087a6903fc6" }, { "path": "zcta_counties/ND.bin", "state": "ND", "rows": 641, "bytes": 33680, "sha256": "c0512e74bb88ac9969f4d7f8de8f4639126525ec2e8caa0ffa53c57ca7c55104" }, { "path": "zcta_counties/NE.bin", "state": "NE", "rows": 979, "bytes": 51048, "sha256": "f9d1fb5ca7807b6da1e36e73f076cd8398fad483209b83880bda4f6f00dd5bc2" }, { "path": "zcta_counties/NH.bin", "state": "NH", "rows": 265, "bytes": 14864, "sha256": "1bc4f14fb63159ff59bf53c63f85168ac43ab6e3b47ccf2265a629b7aba65c33" }, { "path": "zcta_counties/NJ.bin", "state": "NJ", "rows": 673, "bytes": 35896, "sha256": "6b8656b91f6421b93c60a5998d32db6fa809b9131f164524a36bd9e3e2953130" }, { "path": "zcta_counties/NM.bin", "state": "NM", "rows": 461, "bytes": 25104, "sha256": "6444a07959814708ed769965c228ab2321fc21ff35ef0db7b6d78798288aa845" }, { "path": "zcta_counties/NV.bin", "state": "NV", "rows": 202, "bytes": 11704, "sha256": "499dabb391d9960852c37b7163adfed114bf209ad14f9566553850dd219ce20c" }, { "path": "zcta_counties/NY.bin", "state": "NY", "rows": 2201, "bytes": 114000, "sha256": "99212f967c18c1150ac2081363c280b4c1b98e3f0fc35a1a6c876193ab14eb10" }, { "path": "zcta_counties/OH.bin", "state": "OH", "rows": 1852, "bytes": 94480, "sha256": "7273eefb1cbfb73dd51bd65536b9718ac11b7dab9b6193bef3b146004fec6b0e" }, { "path": "zcta_counties/OK.bin", "state": "OK", "rows": 1012, "bytes": 52712, "sha256": "0849b5ef6a6a68a7fab82533e2dc42cf7b870b973a6e6d82f8880be287c7b9d3" }, { "path": "zcta_counties/OR.bin", "state": "OR", "rows": 529, "bytes": 28576, "sha256": "00bbb054c7469fda8d8192ae1addc01b2fe242b58d1b24516f049bb38f9041e0" }, { "path": "zcta_counties/PA.bin", "state": "PA", "rows": 2245, "bytes": 116120, "sha256": "1de323ab9d7aa63a3c7c48e79c21fe21de66a728c994135938341166c72d410f" }, { "path": "zcta_counties/PR.bin", "state": "PR", "rows": 250, "bytes": 15264, "sha256": "459accd3bd78df84efe883fbb06c265a452016ffd27dc83bd80806a3d641aa13" }, { "path": "zcta_counties/RI.bin", "state": "RI", "rows": 83, "bytes": 5384, "sha256": "ef68900bc7e0e4793f734c54addb3887fe8df731578b178809475124120b7cac" }, { "path": "zcta_counties/SC.bin", "state": "SC", "rows": 626, "bytes": 33080, "sha256": "3faef7995a9c283d0d4be22d0f6bf476c1affbafcbe02f7611ce0e4a1c1fd62a" }, { "path": "zcta_counties/SD.bin", "state": "SD", "rows": 656, "bytes": 34648, "sha256": "b2ab4b726bb0af9ecda3605f40b43885330fbfde99edef04961f04a2da79e0f7" }, { "path": "zcta_counties/TN.bin", "state": "TN", "rows": 1065, "bytes": 55312, "sha256": "063b4c3cd6ec47494057a75c7b5baea436b3683f735007fe3e99d51751018012" }, { "path": "zcta_counties/TX.bin", "state": "TX", "rows": 2893, "bytes": 150480, "sha256": "73843738dd8507731b475dccbea7fc3519dc8b30a299129959001f7f080d82ce" }, { "path": "zcta_counties/UT.bin", "state": "UT", "rows": 326, "bytes": 18416, "sha256": "350f42bc5257e7a022569b11bf516dd0c1c15f97f6e584da3438da31522e0110" }, { "path": "zcta_counties/VA.bin", "state": "VA", "rows": 1314, "bytes": 69496, "sha256": "96cd093f6533221ffb59bdd22f4a83c9188f5a860a96aa4bd9d99b1f56748901" }, { "path": "zcta_counties/VI.bin", "state": "VI", "rows": 6, "bytes": 1312, "sha256": "578b2fcebb72168f44e986b85858739a9e22f83ab2cf12cc452a11621da348c2" }, { "path": "zcta_counties/VT.bin", "state": "VT", "rows": 309, "bytes": 17048, "sha256": "e8e11048d7f31d3768a83fd68e24f04a1668735fc9ab15642dfcd6d27597298e" }, { "path": "zcta_counties/WA.bin", "state": "WA", "rows": 700, "bytes": 37584, "sha256": "4d06c747e618686a5a83be80005e7a28d6e70e4eed94fb1880cba861b2e723f1" }, { "path": "zcta_counties/WI.bin", "state": "WI", "rows": 1202, "bytes": 61904, "sha256": "2fefbaf58d359837736538eadd63ad80f1ed26bb43abc093cd2e1a0e030a7a08" }, { "path": "zcta_counties/WV.bin", "state": "WV", "rows": 955, "bytes": 50280, "sha256": "c5bf90a9792cb7540f95dd187a60fccc72fe8a966000557651957f1c0fe839e8" }, { "path": "zcta_counties/WY.bin", "state": "WY", "rows": 209, "bytes": 12176, "sha256": "2ca93b0074111f9d3b487991660b99445a099ba60ebfb4e9dd1a3c6d6a48489f" } ], "download": { "path": "zcta_counties.csv.gz", "bytes": 677141, "sha256": "fb57e7a1a52e0a0be10de7a7b8a06dd516ddc972af9ca7fc0adcdbe7459a968a", "format": "text/csv; gzip" }, "license": "CC-BY-4.0", "credits": [ { "publisher": "U.S. Census Bureau", "attribution": "Source: U.S. Census Bureau, 2020 ZCTA to County Relationship File.", "note": "Modified by gridprims." } ], "notices": [] } ] }