California's population dipped below 39 million as of July, according to the Census Bureau, after seeing its net domestic migration loss this year exceed last year's. Only New York has seen a greater loss as a percentage of population.

A recent post noted the five Southern states responsible for 75 percent of the nation's population growth from July 1, 2022 to July 1, 2023 according to U.S. Census Bureau data released on December 19. What about the population losers?
“California was one of just eight states that lost population between 2022 and 2023, according to the Census Bureau,” reports Christian Leonard for the San Francisco Chronicle on Dec 21. “New York had by far the biggest percentage decline, losing about 102,000 people, or 0.5% of the population.”
In fact, New York's population loss last year was also the nation's highest. More on New York below.
“California’s population dipped by about 75,000 from 2022 to 2023, estimates released Tuesday by the Census Bureau shows, with about 38,965,000 million people in the state this year,” adds Leonard in the source article, “the lowest count since 2015.”
[Related: California Decline: Population Likely Peaked Three Years Ago, July 27, 2023]
Net domestic migration
The net outflow of residents, known as net domestic migration, or more specifically, negative net domestic migration, is staggering from the Golden State which has grown in population continuously since statehood in 1850 until 2020.
About 338,000 more people left California for other states than vice versa from July 2022 to July 2023, the Census Bureau data shows. That’s slightly greater than the 333,000 from 2021 to 2022, and the most of any state. California historically loses more people to the rest of the country than it gains.
Empire State losses
“New York’s population decreased by 101,984 residents—the largest loss of any state—during the 12-month period that ended last July 1, according to just-released Census Bureau estimates,” reported E.J. McMahon for the Empire Center on December 19.
The Empire State’s population as of mid-2023 was pegged at 19,571,216, a cumulative decline of 631,104 from the Census Bureau’s updated April 2020 base count.
The 12-month trend for the period ending last July 1 was driven by a net outflow of 216,778 New Yorkers to the rest of the country — meaning 216,778 more people moved out of the Empire State than moved in from other states during the previous 12 months.
The six other losers
“Eleven states that lost population in 2022 are now seeing gains: New Jersey (30,024), Ohio (26,238), Minnesota (23,615), Massachusetts (18,659), Maryland (16,272), Michigan (3,980), Kansas (3,830), Rhode Island (2,120), New Mexico (895), Mississippi (762), and Alaska (130)," according to the Census Bureau.
The six other states that lost population in the year ending July 1, 2023:
- Illinois (-32,826)
- Louisiana (-14,274)
- Pennsylvania (-10,408)
- Oregon (-6,021)
- Hawaii (-4,261)
- West Virginia (-3,964)
Additional reading on California's staggering population loss:
- California Could Lose 5 Congressional Seats in 2030 Apportionment, September 21, 2023 by The Census Project
- California Has Lost Its Superpower, August 03, 2023 by Bill Fulton in Slate
FULL STORY: The California exodus continues. Chart shows how unusual the population drop was

Rethinking Redlining
For decades we have blamed 100-year-old maps for the patterns of spatial racial inequity that persist in American cities today. An esteemed researcher says: we’ve got it all wrong.

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

California High-Speed Rail's Plan to Right Itself
The railroad's new CEO thinks he can get the project back on track. The stars will need to align this summer.

US Senate Reverses California EV Mandate
The state planned to phase out the sale of gas-powered cars by 2035, a goal some carmakers deemed impossible to meet.

Trump Cuts Decimate Mapping Agency
The National Geodetic Survey maintains and updates critical spatial reference systems used extensively in both the public and private sectors.

Washington Passes First US ‘Shared Streets’ Law
Cities will be allowed to lower speed limits to 10 miles per hour and prioritize pedestrians on certain streets.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions