Bryan McAllister’s personal reference notebook
September 12, 2026Short & citedBlog
Civic Viewpoint.
A quiet encyclopedia with a personal desk
Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Civic Brief • City

Jacksonville

Jacksonville is a city in northeastern Florida, United States, and the county seat of Duval County.

Updated September 12, 20261 min readCited sources

Jacksonville is the most populous city in Florida and one of the largest U.S. cities by land area. It is located in northeastern Florida on the St. Johns River near the Atlantic coast.

What it is

Jacksonville is the county seat of Duval County, with which it consolidated in 1968, greatly expanding its boundaries. The city lies along the St. Johns River near the Atlantic Ocean, encompassing extensive coastline, riverfront, and parkland.

Why it matters

As Florida’s most populous city (949,611 in 2020) and a major port, Jacksonville is a key commercial, banking, shipping, and transportation centre. Its large urban park system and beaches also make it a notable recreational destination.

Key details

Founded in 1822 and incorporated in 1832, Jacksonville’s modern form dates to the 1968 consolidation with most of Duval County. Its metropolitan area is among the largest in the southeastern United States.

In short

  • Most populous city in Florida (2020: 949,611)
  • One of the largest U.S. cities by land area
  • Major port and transportation hub
  • Consolidated with Duval County in 1968

Quick questions

What state is Jacksonville in?
Jacksonville is in Florida, in the United States.
Is Jacksonville the largest city in Florida?
Yes. It is the most populous city in Florida, based on the 2020 census.
Why is Jacksonville so large geographically?
Its size expanded greatly in 1968, when the city consolidated with most of Duval County.

Sources

  1. Wikipedia — https://en.wikipedia.org/wiki/Jacksonville,_Florida
    Supports: Population, county seat status, consolidation with Duval County, and city area.
  2. Encyclopaedia Britannica — https://www.britannica.com/place/Jacksonville-Florida
    Supports: Geographic location, consolidated government, area, and civic/economic role.
  3. Visit Jacksonville — https://www.visitjacksonville.com/about/research-information/jax-facts/
    Supports: Area size, park system, and city facts.
  4. Kiddle — https://kids.kiddle.co/Jacksonville,_Florida
    Supports: General location, county seat status, and 1968 consolidation.
  5. Jacksonville University — https://www.ju.edu/about/jacksonville.php
    Supports: Coastline, riverfront, parks, and city character.