Yes
The border state of Maryland remained in the Union during the US Civil War and was a slave holding state. Washington DC is surrounded by Maryland and by the Potomac River.
There were five slave states that remained in the Union. Initially there were four -- Delaware, Maryland, Kentucky and Missouri. West Virgina separated from Virginia when it (Virginia) seceded from the Union. West Virginia was admitted to the Union in 1863 as a slave state. West Virgina remained in the Union making it the fifth slave state not to secede. These five slave states were called border states.
Missouri, Maryland, Kentucky and Delaware.
I think they are Missouri, Kentucky, Maryland, Delaware and West Virginia.
Kentucky Missouri Maryland Delaware
Missouri, Kentucky, Maryland, Delaware and West Virginia were all slave states that remained in the Union.
Kentucky, Maryland, Delaware, and Missouri
It separated Pennsylvania (free soil) from Maryland (slave). Maryland did not join the Confederacy, so it remained a Union state.
Kentucky, Missouri, Maryland, Delaware.
Missouri, Kentucky, Delaware and Maryland were border states that remained in the union but still allowed slavery. The state legislatures of Kentucky, Delaware and Maryland voted to remain. Missouri voted to leave the union but union troops stormed the state capital and installed a pro union government to insure they remained with the union. Prior to the Emancipation Proclamation captured slaves were returned to their masters in Missouri, Kentucky, Delaware and Maryland and in fact there are records of the Union Army conducting slave auctions in the border states.
Maryland, Delaware, Missouri, and Kentucky were border states that remained with the union during the civil war.
Weat Virginia Delaware, Maryland, Missouri, and Kentucky were five slave states that did not secede the Union, and the were were called border states.