What Share Of Salt Lake City Is Mormon? The Answer Isn't Simple
The best-supported answer is that roughly 49% of Salt Lake County residents were Mormon in the most widely cited public estimate, but the share of people who actively identify as Mormon is much lower, with a 2023 study finding 42% of Utahns statewide self-identified as Latter-day Saint or Mormon. Salt Lake City itself is smaller and more religiously diverse than the county, so the city-level percentage is lower than the county figure and depends heavily on whether you mean church membership, self-identification, or active participation.
What the numbers mean
The phrase Salt Lake City residents is often used loosely, but most published statistics are actually for Salt Lake County rather than the city proper. In 2018, reporting based on church membership data said Mormons made up 49% of Salt Lake County residents, the lowest level reported there since at least the 1930s. That figure included both active and nonactive members, which is why it is higher than estimates based on self-identification or attendance.
For the city itself, older profile data suggested that "slightly more than half" of Salt Lake City residents identified as Mormon at one point, but more recent statewide survey evidence points to a notable decline in identification across Utah. The practical takeaway is that the answer has shifted over time and varies by measurement method.
Why estimates differ
The disagreement comes from three different ways of counting religion: church membership records, self-identification in surveys, and active participation. Church membership figures tend to produce the highest numbers because they can include people who no longer practice or no longer personally identify with the faith. Survey-based estimates are usually lower because they count only people who say they are Mormon or Latter-day Saint.
- Membership count: Usually the highest number, because it includes inactive members.
- Self-identification: Usually lower, because it asks how people describe their own religion.
- Active participation: Usually the lowest, because it depends on attendance and engagement.
Snapshot of estimates
| Measure | Geographic area | Estimate | What it captures |
|---|---|---|---|
| Church membership data | Salt Lake County | 49% | Active and inactive LDS members |
| Self-identification survey | Utah statewide | 42% | People who say they are Mormon or Latter-day Saint |
| Active-member estimate | Salt Lake County | About 24% | Estimated active Mormon participation |
Historical context
Salt Lake City has been the symbolic center of the Church of Jesus Christ of Latter-day Saints since the 19th century, so many people still assume the city is overwhelmingly Mormon. That reputation is rooted in settlement history, but the demographic reality has changed as the metro area has grown, diversified, and attracted more residents from outside the faith. A 2018 report described Salt Lake County as becoming "more religiously diverse," and that trend has continued.
Statewide survey work published in late 2023 found that only 42% of Utahns self-identify as Latter-day Saint or Mormon, marking the first time a majority of Utah residents did not identify with the faith. That does not mean Salt Lake City is no longer culturally shaped by the church; it means the city and county are no longer dominated by one religious identity in the way outsiders often imagine.
How to interpret the headline
- If you want the broadest church-based estimate, use 49% for Salt Lake County.
- If you want the share of people who personally identify as Mormon, use a lower survey-based figure.
- If you want the share of active participants, the number is lower still, around the mid-20% range in Salt Lake County.
"Fewer than half the residents of Salt Lake County belong to the Mormon church" is the clearest shorthand for the modern demographic shift in the area.
What this means locally
In everyday life, Salt Lake City now looks more religiously mixed than its nickname suggests. Temple Square and other historic LDS landmarks still matter enormously, but the metro area also includes many residents who are unaffiliated, Catholic, Protestant, Jewish, Muslim, Buddhist, or simply not religious. That combination is why the answer to the "what percentage is Mormon?" question depends on whether you mean the county, the city, the metro area, or the state.
For readers who want one simple figure, the most defensible answer is that around half of Salt Lake County residents were counted as Mormon in the latest widely cited church-based estimate, while the share who actively identify or participate is meaningfully lower. For Salt Lake City proper, the percentage is lower than the county figure and has been trending downward over time.
What are the most common questions about Percentage Of Salt Lake City Residents Who Are Mormon?
How Mormon is Salt Lake City?
Salt Lake City is still the cultural center of Mormon history, but it is not accurately described as uniformly Mormon today. The city sits inside a broader metro area where religious diversity has grown for decades, and county-level data show the LDS share falling below 50% in widely cited estimates.
Is Salt Lake City still majority Mormon?
Not in the simplest sense people often mean. County-level figures show Mormon residents at 49%, and survey data show a lower self-identified share statewide, so the old "nearly everyone is Mormon" stereotype no longer fits the city or county well.
Why do some sources say 49% and others say 42%?
Because they measure different things. The 49% figure comes from church membership data that includes inactive members, while the 42% figure comes from a survey of self-identification among Utah adults.
Does this mean Mormon influence is gone?
No. Religious influence in Salt Lake City remains strong in history, architecture, politics, and civic culture, even as the population has become more religiously mixed. The demographic balance has changed, but the historical presence of the church remains central to the city's identity.