The Pennsylvania Department of Labor and Industry said the seasonally adjusted unemployment rate for the Indiana Micropolitan Statistical Area, as Indiana County is regarded, rose from 4.6 percent in August and 4.8 percent in September.
The increase comes as an increase in the number of those employed did not keep pace with an increase in the total workforce.
DLI said total nonfarm jobs in the statistical area increased by 300 to 32,900, while the total workforce was up from 39,100 in September to 39,700 in October.
State officials said the increase in nonfarm jobs was mostly due to education-related supersectors.
Over the course of the past 12 months the labor force in Indiana County has risen from 38,000, while the number of those employed only has risen from 37,000 to 37,500.
Indiana County has remained in the range of neighboring counties. DLI said Indiana and Clearfield counties were among four counties tied for 48th place among the 67 Pennsylvania counties.
Armstrong County had 5.6 percent jobless in October, Cambria County 5.2 percent, Jefferson County 4.9 percent and Westmoreland County 4.8 percent.
Unemployment rates across Pennsylvania ranged from 3.1 percent in Adams and Centre counties to 8.7 percent in Cameron County.