Changes to electoral boundaries mean some Yukon voters will find themselves in a new district come the next election, scheduled for 2011.

Last December, MLAs voted in favour of realigning the ridings of Mount Lorne, Whitehorse West, Copperbelt, McIntyre-Takhini and Southern Lakes.

While current boundaries and respective MLAs remain unchanged until an election is called, when it is, the result will be five new ridings and one more seat in the assembly.

That will raise the number of sitting members to 19.

Portions of the existing Copperbelt and Whitehorse West districts will be combined to create Copperbelt North. It includes Lobird and two-thirds of the Copper Ridge subdivision.

The new riding of Copperbelt South will include the most southern part of the existing Copperbelt district and the subdivisions of Mount Sima, Spruce Hill, Pineridge, Wolf Creek North, Wolf Creek, Mary Lake, Cowley Creek, Whitehorse Copper, MacRae and Golden Horne.

Residents who live on the South Klondike Highway and surrounding areas from the Carcross cutoff to the existing boundary of Southern Lakes will be part of the new Mount Lorne-Southern Lakes riding.

It will encompass the communities of Robinson, Marsh Lake, Carcross, Tagish, the Hamlet of Mount Lorne and the Atlin Road to the B.C. border.

The subdivisions of McIntyre, Granger, Valleyview and Hillcrest will comprise the new Mountain View riding.

Residents of Fish Lake Road, Takhini, Takhini North, Mountain View and Ravens Ridge will make up the new riding of Takhini-Kopper King. The Kopper King, Northland and Takhini trailer parks will also be included.

Liberal Leader Arthur Mitchell, the MLA for Copperbelt - the district facing the most significant changes - says it's premature to say which riding he would run in next time voters go to the polls.

"I've got bonds across the riding and friends across the riding and I'm certainly not going to make any declarations at this point," he said.

"I think the important thing is we're halfway through a term right now and I've got those people (in Copperbelt) to represent."

The subdivision of Copper Ridge, a large part of the current Copperbelt district, has continued to grow since the 2006 election, when eligible voters rose to 1,748 from 1,296 in 2002.

Based on 18,505 eligible voters in the 2006 election, Copperbelt's electorate is 60 per cent more than the average number of voters in the other ridings.

Using a standard deviation of plus or minus 25 per cent (based on Canadian common law) the newly-configured ridings bring more densely populated regions in the territory within this limit.

While 12 months' residency in the territory prior to an election is required to vote or to run as a candidate, Mount Lorne MLA Steve Cardiff is another legislative member facing a decision of where to canvass and hang his campaign signs come 2011.

Cardiff, who is also vying for the NDP leadership to be determined this fall, said earlier this afternoon Copperbelt South or Mount Lorne-Southern Lakes are two possibilities.

"Right now, my focus is working with Todd (Hardy, the outgoing NDP leader) and representing everybody in the Yukon and representing the people who elected me in Mount Lorne," said Cardiff. "But I'm comfortable (running) wherever and when the time is right, I'll make that decision."

Boundaries for the districts of Klondike, Kluane, Lake Laberge, Mayo-Tatchun, Pelly-Nisutlin, Riverdale North, Riverdale South, Vuntut Gwitchin, Watson Lake and Whitehorse Centre remain unchanged.