How much does it cost to change your last name in Minnesota?

I am 19 years old and i want to change my last name. how much it cost? and how long does it take to get yur last name changed? and wht kind of reason u need to change yur last name. well my last name i really don't like it and ppl make fun somtimes so i want change it to another name. i wud feel more comfortable. and do i need go court to get it changed legally? help plz thank uHow much does it cost to change your last name in Minnesota?Call the clerk in the county courthouse and ask. It varies by state and county. In my county is is $320 plus the cost of a legal notice in a newspaper and it takes a little over 4 weeks.You don't need a reason. You need to do it legally if you want to avoid a world of trouble two, five or 20 years down the road, especially if you apply for a passport or get a job that requires a security clearance.