The budgets of Texas’ five largest counties have increased by roughly two-thirds over the past decade, far outpacing population growth and exceeding the rate of inflation.

Harris, Dallas, Tarrant, Bexar and Travis counties collectively budgeted about $8.7 billion in 2016. By 2026, their combined spending plans had climbed to approximately $14.6 billion, an increase of about 67 percent.

That growth comes as county officials across Texas work to finalize budgets for the fiscal year beginning Oct. 1. Of the five largest counties, Dallas County has already adopted its fiscal year 2027 budget, while Harris, Tarrant, Bexar and Travis counties are still considering proposed spending plans.

The decade-long increase in county spending significantly exceeds two other measures that help put the numbers in perspective.

Cumulative inflation over the past 10 years was about 39 percent, according to the U.S. Bureau of Labor Statistics. Meanwhile, the combined population of the five counties increased from approximately 12.3 million residents in 2016 to 13.5 million in 2025, according to U.S. Census Bureau estimates. That amounts to population growth of about 9.4 percent.

The headline numbers, however, obscure significant differences among Texas’ largest counties. Spending has grown dramatically in Travis and Dallas counties, while Tarrant and Bexar counties have kept their overall budget growth much closer to inflation despite relatively strong population gains.

Travis County stands out with the largest percentage increase.

Its proposed $2.3 billion budget is approximately 130 percent larger than the $1 billion budget adopted in 2016. Travis County has also experienced the fastest population growth among the five counties, although the increase in residents has been nowhere near the growth in spending.

The county’s population rose about 15 percent, from approximately 1.2 million residents in 2016 to 1.4 million in 2025.

Dallas County has followed a different path. Its newly adopted $1.8 billion budget represents a 91.2 percent increase from the $930.5 million budget approved in 2016.

Yet Dallas County recorded the smallest population increase of the group. Its population grew only about 3.3 percent over the period, from roughly 2.6 million people in 2016 to 2.7 million in 2025.

Harris County, by far the largest of the five, accounts for nearly half of their combined spending.

The county is considering a $7.1 billion budget, approximately 60.6 percent higher than its comparable 2016 spending of about $4.4 billion. That earlier figure combines primary county government functions with the Harris Health system. Harris Health was reported separately in 2016, although it received county funding and is now included in county budget documents.

Harris County’s population increased at a much slower pace than its budget, rising about 9.2 percent from 4.6 million residents in 2016 to approximately 5 million in 2025.

The picture is noticeably different in Bexar and Tarrant counties.

Bexar County is considering a $2.6 billion budget, up approximately 42.9 percent from the $1.8 billion approved in 2016. Its population, meanwhile, increased by about 12.5 percent, from 1.9 million to 2.2 million.

That gives Bexar one of the strongest population growth rates among the five counties while keeping its overall budget increase far below those recorded in Travis and Dallas counties.

Tarrant County shows a similar pattern.

Its proposed $834.1 million budget is the smallest among the five counties and represents an increase of about 41.8 percent from the $588.2 million budget adopted in 2016.

During roughly the same period, Tarrant County’s population increased by 11.4 percent, climbing from about 2 million residents to 2.2 million.

The comparisons involve total county budgets rather than just general funds. General funds typically receive the most attention during annual budget debates because they represent the primary pool of discretionary county spending, but counties also operate numerous other funds dedicated to specific programs, services and obligations.

The decade of budget growth also does not mean every additional dollar represents an expansion of government services. Inflation has raised the cost of labor, construction, equipment, health care and other county expenses substantially since 2016.

Even after accounting for that inflation, however, the five counties’ combined 67 percent budget increase remains considerably higher than the 39 percent rise in consumer prices and the 9.4 percent increase in their combined population.

And the county-level numbers show there has been no single spending pattern across urban Texas. Travis County’s proposed budget is more than double what it was a decade ago, while Tarrant County’s increase has remained relatively close to the rate of inflation.

As commissioners courts finalize another round of budgets and property tax rates, those differences provide a decade-long measure of how differently Texas’ largest county governments have responded to population growth, rising costs and demands for local services.