| Code | Display | Comments |
|---|
 A | Atheist | |
| B | Baptist | |
| C | Catholic | |
| E | Episcopalian | |
| J | Judaism | |
| L | Lutheran | |
| M | Church of Latter Day Saints (Mormon) | |
| N | Hindu | |
| P | Protestant | |
| AGN | Agnostic | |
| ATH | Atheist | |
| BAH | Baha'i | |
| BRE | Brethren | |
| BUD | Buddhist | |
| BMA | Buddhist: Mahayana | |
| BTH | Buddhist: Theravada | |
| BTA | Buddhist: Tantrayana | |
| BOT | Buddhist: Other | |
| CFR | Chinese Folk Religionist | |
| CHR | Christian | |
| ABC | Christian: American Baptist Church | |
| AMT | Christian: African Methodist Episcopal | |
| AME | Christian: African Methodist Episcopal Zion | |
| ANG | Christian: Anglican | |
| AOG | Christian: Assembly of God | |
| BAP | Christian: Baptist | |
| CRR | Christian: Christian Reformed | |
| CHS | Christian: Christian Science | |
| CMA | Christian: Christian Missionary Alliance | |
| COC | Christian: Church of Christ | |
| COG | Christian: Church of God | |
| COI | Christian: Church of God in Christ | |
| COM | Christian: Community | |
| COL | Christian: Congregational | |
| EOT | Christian: Eastern Orthodox | |
| EVC | Christian: Evangelical Church | |
| EPI | Christian: Episcopalian | |
| FWB | Christian: Free Will Baptist | |
| FRQ | Christian: Friends | |
| FUL | Christian: Full Gospel | |
| GRE | Christian: Greek Orthodox | |
| JWN | Christian: Jehovah's Witness | |
| MOM | Christian: Latter-day Saints | |
| LUT | Christian: Lutheran | |
| LMS | Christian: Lutheran Missouri Synod | |
| MEN | Christian: Mennonite | |
| MET | Christian: Methodist | |
| NAZ | Christian: Church of the Nazarene | |
| ORT | Christian: Orthodox | |
| PEN | Christian: Pentecostal | |
| COP | Christian: Other Pentecostal | |
| PRE | Christian: Presbyterian | |
| PRO | Christian: Protestant | |
| PRC | Christian: Other Protestant | |
| QUA | Christian: Friends | |
| REC | Christian: Reformed Church | |
| REO | Christian: Reorganized Church of Jesus Christ-LDS | |
| CAT | Christian: Roman Catholic | |
| SAA | Christian: Salvation Army | |
| SEV | Christian: Seventh Day Adventist | |
| SOU | Christian: Southern Baptist | |
| UCC | Christian: United Church of Christ | |
| UMD | Christian: United Methodist | |
| UNI | Christian: Unitarian | |
| UNU | Christian: Unitarian Universalist | |
| WES | Christian: Wesleyan | |
| WMC | Christian: Wesleyan Methodist | |
| COT | Christian: Other | |
| CNF | Confucian | |
| DOC | Disciples of Christ | |
| ERL | Ethnic Religionist | |
| HIN | Hindu | |
| HSH | Hindu: Shaivites | |
| HVA | Hindu: Vaishnavites | |
| HOT | Hindu: Other | |
| JAI | Jain | |
| JEW | Jewish | |
| JCO | Jewish: Conservative | |
| JOR | Jewish: Orthodox | |
| JRC | Jewish: Reconstructionist | |
| JRF | Jewish: Reform | |
| JRN | Jewish: Renewal | |
| JOT | Jewish: Other | |
| MOS | Muslim | |
| MSH | Muslim: Shiite | |
| MSU | Muslim: Sunni | |
| MOT | Muslim: Other | |
| NAM | Native American | |
| NRL | New Religionist | |
| NOE | Nonreligious | |
| SHN | Shintoist | |
| SIK | Sikh | |
| SPI | Spiritist | |
| OTH | Other | |
| VAR | Unknown | |