Midlothian is a county in Scotland that is bordered by Peebles-shire, Selkirkshire, Lanarkshire , East Lothian and Berwickshire. Its main cities and towns include Balerno, Bonnyrigg, Currie, Dalkeith, Edinburgh, Heriot, Juniper Green, Kirknewto, Lasswade, Loanhead, Musselburgh, Newbridge, Pathhead, Penicuik, Rosewell and Roslin.