Find the fastest-growing U.S. counties from July 2024 to July 2025. Explore Census data, starting-population filters, growth rates and ranked CSV exports.
Jasper County leads this percentage-growth ranking with 6.04%. The comparison covers July 1, 2024 to July 1, 2025. The default includes counties with at least 5,000 residents in the starting year.
Jasper County, South Carolina leads the default qualified ranking at 6.04%, increasing from 36,338 to 38,533 residents. Waller County, Texas follows at 5.69%. The interval is exactly one July-to-July year.
The default comparison requires at least 5,000 residents on July 1, 2024. It leaves 2,819 qualified counties from an eligible universe of 3,144. This is an explicit site filter, not an official Census definition of a fast-growing place. Change the starting-population field to explore another threshold.
How the starting population changes a growth ranking
Without a minimum-population requirement, Loving County, Texas leads with 10.64% growth. That change is only 5 additional residents against a starting population of 47. A small denominator can produce a high rate from a change that is modest in absolute terms.
Removing the threshold is a valid way to study small places; retaining it is a valid way to compare larger communities. The research question determines the appropriate universe. Always report the threshold with the result, and compare the percentage with the adjacent absolute-change column. The filtered export preserves the displayed observations and starting population.
Comparison universe: 3,144 U.S. counties and county equivalents. Source: PEP Vintage 2025. Population date: July 1, 2025. Growth interval: July 1, 2024–2025. Ties share a competition rank; subsequent ranks skip tied positions. Filters produce a subset of this universe and do not change the national profile rank.
One-year growth versus a five-year growth trajectory
Between July 1, 2020 and July 1, 2025, Jasper County changed by 32.15%. Its compound annualized change over those five years was 5.73%. Those are separate measures from the latest one-year rate.
A high recent rate does not prove that the same pace will continue. Published births, deaths and migration components on the profiles help account for the latest total but do not establish future trends. Use an indexed multi-year chart in the comparison tool to inspect the path rather than extrapolating a single annual percentage.
Sources, calculation rules and downloadable results
Source: co-est2025-alldata.csv, Census Population Estimates Program, Vintage 2025, variables POPESTIMATE2024 and POPESTIMATE2025. Density additionally uses 2025 Gazetteer ALAND joined by official code. The retained source snapshot is pep-2025-r1; calculations use unrounded values.
Percentage order uses 100 × (2025 population / 2024 population − 1), with a positive 2024 denominator. Equal unrounded metric values share a competition rank, and the following rank skips the tied positions. Display rounding can make different underlying values look identical; the table order uses the originals.
Export visible rows after filtering to preserve the displayed subset. Use complete dataset downloads for all observations, or population research tools for a longer comparison. A ranking is a dated descriptive result, not an official forecast. Publication vintages can revise earlier years; retain the release identifier with your research.
