The Settlement and Early Development of Salt Lake City, Utah

How a barren desert valley became a thriving city and the spiritual center of a new faith.

By Garret Merkley · Explainer · Jun 8, 2026

Branched from Brigham Young and the Journey West: What Happened After Joseph Smith's Death

Quick take

Brigham Young led Mormon pioneers to the Salt Lake Valley in 1847, seeking religious freedom and an isolated refuge.
The city was meticulously planned around a central temple square, emphasizing community, agriculture, and order.
Early challenges included extreme aridity, isolation, and conflicts with the U.S. government.
Salt Lake City's unique founding principles shaped its rapid growth and enduring cultural identity.

The settlement and early development of Salt Lake City, Utah, describes the process by which members of The Church of Jesus Christ of Latter-day Saints, often called Mormon pioneers, established a permanent community in the arid Great Salt Lake Valley starting in July 1847. Led by Brigham Young, this effort transformed a remote desert into a thriving city and the spiritual and administrative center of their faith.

The Arrival and Initial Vision

Upon arriving in the valley on July 24, 1847, Brigham Young declared, “This is the Place,” signaling the end of their arduous westward migration. The pioneers immediately began the immense task of settlement. Their first actions were practical and urgent: diverting water from City Creek to soften the parched earth for plowing and planting crops. Within days, a temporary fort was constructed, and the valley was surveyed, laying the groundwork for a meticulously planned city.

A City Built on Principle: The Plat of Zion

Salt Lake City's design was based on the “Plat of Zion,” a vision for ideal communities. The plan featured exceptionally wide streets (132 feet), large ten-acre blocks, and uniform building lots, all arranged around a central Temple Square. This grid system promoted order and equality, with ample space for gardens and orchards on each plot. Early land and water resources were managed communally, emphasizing self-sufficiency and mutual support, critical for survival in the isolated desert environment.

Overcoming Early Challenges

The pioneers faced immense environmental hurdles, including the valley's aridity and severe isolation. Developing extensive irrigation systems, a feat of engineering for its time, was paramount to cultivate crops. They also battled natural pests, most famously a cricket infestation in 1848 that was reportedly saved by flocks of seagulls. Beyond nature, the settlers navigated complex relations with local Native American tribes and, later, significant political tensions and conflicts with the U.S. federal government, particularly concerning polygamy and territorial governance. Despite these challenges, continuous immigration of new converts swelled the city's population, fueling its rapid growth.

The settlement and early development of Salt Lake City stand as a remarkable testament to human resilience, communal effort, and visionary planning. It represents a unique chapter in American westward expansion, demonstrating how a determined group could transform a harsh environment into a flourishing center of culture, religion, and commerce. Its foundational principles, particularly its distinctive urban planning and emphasis on self-reliance, continue to shape Utah's unique identity and influence its role as a significant hub in the Intermountain West.

Key Principles of Salt Lake City's Founding

Religious Freedom: A primary motivator for seeking an isolated refuge.
Communal Effort: Essential for irrigation, construction, and survival.
Planned Growth: The “Plat of Zion” provided a structured, equitable layout.
Self-Sufficiency: Aim to produce all necessities within the community.

Why did Brigham Young choose the Salt Lake Valley?

Young sought an isolated location where his followers could practice their religion without persecution. The valley, though arid, had reliable mountain streams for irrigation and was considered undesirable by other westward migrants, offering the desired solitude.

How quickly did Salt Lake City grow after its founding?

Growth was remarkably swift. From the initial 140 pioneers in July 1847, the population swelled to over 8,000 by 1850, largely due to the continuous influx of Latter-day Saint converts from the eastern U.S. and Europe.

What was the “Plat of Zion” and how did it influence the city's layout?

The “Plat of Zion” was a detailed urban plan that dictated the city's grid system, featuring exceptionally wide streets, large ten-acre blocks, and a central Temple Square. This design aimed to promote order, community, and ample space for homes and gardens.

What role did irrigation play in the city's early success?

Irrigation was absolutely critical. The pioneers were among the first in North America to implement large-scale, communal irrigation systems, diverting mountain streams to cultivate crops in the arid valley, making agriculture possible and sustaining the growing population.

Were there conflicts with the U.S. government during the early settlement?

Yes, significant conflicts arose, particularly during the “Utah War” (1857-1858), when the U.S. government sent troops to assert federal authority over the territory, largely fueled by tensions surrounding Latter-day Saint practices like polygamy and their unique form of governance.