No. In area Union county is the largest, and in population the Pulaski county. Little Rock isn't even a county. It's a city.
Pulaski county
Count Pulaski in Little Rock, Arkansas
11
The first two counties established in Arkansas were Arkansas County and Pulaski County. Arkansas County was created in 1813, making it the oldest county in the state, while Pulaski County was formed shortly after in 1818. These counties were among the earliest administrative divisions as settlers began to organize the region.
According to census.gov, Pulaski County, Arkansas, has the most population at 373,911 people in 2007.
There are 75 counties in Arkansas. Pulaski County, which includes Little Rock, is the most populous county in Arkansas with a population of 392,000.
808 square miles
Click the link.
Tim Griffin is the representative from Pulaski County in the United States House of Representatives. Congressman Griffin is a member of the House Ways and Means Committee.
There are 10 states in the United States that have a Pulaski County. These states are Arkansas, Illinois, Indiana, Kentucky, Missouri, Nebraska, New Mexico, Oklahoma, Tennessee, and Virginia. Each Pulaski County is named after the Polish nobleman Casimir Pulaski, who fought in the American Revolutionary War.
At least 12 same-sex couples were issued marriage licenses in Pulaski County on June 26, 2015.Previously, 125 same-sex couples married in Pulaski County on May 12, 2014, the first business day after same-sex marriage was temporarily legalized in Arkansas by court order.