A look at the regions that could be affected by the provincial review,

DURHAM REGION

When region was created: Jan. 1, 1974 Regional chair: John Henry Total population: 645,862 Number of regional council members: 29. Members include the regional chair, and mayors and regional councillors from the local area municipalities. Lower-tier municipalities:

Ajax

Population: 119,677 Mayor: Shaun Collier Regional councillors: 3 Ward councillors: 3 Average number of constituents per councillor (ward and regional): 19,946 Geographic size: 67 square kilometres

Brock

Population: 11,642 Mayor: Debbie Bath-Hadden Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 1,940 Geographic size: 423.34 square kilometres

Clarington

Population: 92,013 Mayor: Adrian Foster Regional councillors: 2 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 15,336 Geographic size: 611 square kilometres

Oshawa

Population: 159,458 Mayor: Dan Carter Regional councillors: 5 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 15,945 Geographic size: 145.64 km2

Pickering

Population: 91,771 Mayor: Dave Ryan Regional councillors: 3 Ward councillors: 3 Average number of constituents per councillor (ward and regional): 15,295 Geographic size: 231.55 square kilometres

Scugog

Population: 21,617 Mayor: Bobbie Drew Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 3,603 Geographic size: 414.71 km2

Uxbridge

Population: 11,832 Mayor: Dave Barton Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 1,972 Geographic size: 15.45 km2

Whitby

Population: 128,377 Mayor: Don Mitchell Regional councillors: 4 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 16,047 Geographic size: 146.66 km2

HALTON REGION

When region was created: Jan. 1, 1974 Regional chair: Gary Carr Total population: 548, 435 Number of regional council members: 21 Lower-tier municipalities:

Burlington

Population: 183,314 Mayor: Marianne Meed Ward Councillors: 6 (serve as both regional and ward) Average number of constituents per councillor: 30,552 Geographic size: 185.66 km2

Halton Hills

Population: 61,161 Mayor: Rick Bonnette Regional councillors: 2 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 6,116 Geographic size: 276.27 km2

Milton

Population: 101,715 Mayor: Gordon Krantz Regional councillors: 4 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 12,714 Geographic size: 40.36 square kilometres

Oakville

Population: 193,832 Mayor: Rob Burton Regional councillors: 7 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 13,845 Geographic size: 138.89 km2

MUSKOKA DISTRICT

When region was created: 1971 Regional Chair: John W. Klinck Total population: 60,599 Number of regional councillors: 23 Lower-tier municipalities:

Bracebridge

Population: 16,010 Mayor: Graydon Smith Regional councillors: 3 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 2,001 Geographic size: 628.22 km2

Gravenhurst

Population: 12,311 Mayor: Paul Kelly Regional councillors: 3 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 1539 Geographic size: 518.06 km2

Georgian Bay

Population: 2,499 Mayor: Peter Koetsier Regional councillors: 2 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 417 Geographic size: 547.61 km2

Huntsville

Population: 19,816 Mayor: Scott Aitchison Regional councillors: 3 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 2,477 Geographic size: 710.01 km2

Lake of Bays

Population: 3,167 Mayor: Terry Glover Regional councillors: 2 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 528 Geographic size: 677.91 km2

Muskoka Lakes

Population: 6,588 Mayor: Don Furniss Regional councillors: 3 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 732 Geographic size: 794.26 km2

NIAGARA REGION

When region was created: Jan 1, 1970 Regional Chair: Jim Bradley Total population: 447,888 Number of regional councillors: 31 Lower-tier municipalities:

Fort Erie

Population: 30,710 Mayor: Wayne Redekop Regional councillors: 1 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 4,387 Geographic size: 166.27 km2

Grimsby

Population: 27,314 Mayor: Jeff Jordan Regional councillors: 1 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 3,035 Geographic size: 68.93 km2

Lincoln

Population: 23,787 Mayor: Sandra Easton Regional councillors: 1 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 2,643 Geographic size: 162.81 km2

Niagara Falls

Population: 88,071 Mayor: Jim Diodati Regional councillors: 3 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 8,006 Geographic size: 209.73 km2

Niagara-on-the-Lake

Population: 17,511 Mayor: Betty Disero Regional councillors: 1 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 1,946 Geographic size: 132.81 km2

Pelham

Population: 17,110 Mayor: Marvin Junkin Regional councillors: 1 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 2,444 Geographic size: 126.43 km2

Port Colborne

Population: 18,306 Mayor: William C. Steele Regional councillors: 1 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 2,034 Geographic size: 121.96 km2

St. Catharines

Population: 133,113 Mayor: Walter Sendzik Regional councillors: 6 Ward councillors: 12 Average number of constituents per councillor (ward and regional): 7,395 Geographic size: 96.13 km2

Thorold

Population: 18,801 Mayor: Terry Ugulini Regional councillors: 1 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 2,089 Geographic size: 82.99 km2

Wainfleet

Population: 6,372 Mayor: Kevin Gibson Regional councillors: 0 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 1,593 Geographic size: 217.31 km2

Welland

Population: 52,293 Mayor: Frank Campion Regional councillors: 3 Ward councillors: 12 Average number of constituents per councillor (ward and regional): 3,486 Geographic size: 81.04 km2

West Lincoln

Population: 14,500 Mayor: Dave Bylsma Regional councillors: 1 Ward councillors: 3 Average number of constituents per councillor (ward and regional): 3,625 Geographic size: 387.81 km2

YORK REGION

When region was created: 1971 Regional Chair: Wayne Emmerson Total population: 1.1 million Number of regional councillors: 21 Lower-tier municipalities:

Aurora

Population: 55,445 Mayor: Tom Mrakas Regional councillors: 0 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 9,241 Geographic size: 49.85 km2

East Gwillimbury

Population: 24,000 Mayor: Virginia Hackson Regional councillors: 0 Ward councillors: 6 Average number of constituents per councillor (ward and regional): Geographic size: 245 km2

Georgina

Population: 45,418 Mayor: Margaret Quirk Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 7,570 Geographic size: 288 km2

King

Population: 24,512 Mayor: Steve Pellegrini Regional councillors: 0 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 4,085 Geographic size: 333 km2

Markham

Population: 328,966 Mayor: Frank Scarpitti Regional councillors: 4 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 27,414 Geographic size: 212.35 km2

Newmarket

Population: 84,224 Mayor: John Taylor Regional councillors: 1 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 10,528 Geographic size: 38.45 km2

Richmond Hill

Population: 185,540 Mayor: Dave Barrow Regional councillors: 2 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 23,193 Geographic size: 100.95 km2

Vaughan

Population: 306,230 Mayor: Maurizio Bevilacqua Regional councillors: 3 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 38,279 Geographic size: 273.52 km2 Whitchurch-Stouffville Population: 45,837 Mayor: Iain Lovatt Regional councillors: 0 Ward councillors: 6 Average number of constituents per councillor (ward and regional): 7,640 Geographic size: 206.41 km2

PEEL REGION

When region was created: Jan 1, 1974 Regional Chair: Nando Iannicca Total Population: 1.382 million Number of regional councillors: 29 Lower-tier municipalities:

Brampton

Population: 593,638 Mayor: Patrick Brown Regional councillors: 6 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 59,364 Geographic size: 266.36 km2

Caledon

Population: 66,502 Mayor: Allan Thompson Regional councillors: 4 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 8,313 Geographic size: 688.16 km2

Mississauga

Population: 721,599 Mayor: Bonnie Crombie Regional and ward councillors (all act in both roles): 11 Average number of constituents per councillor (ward and regional): 65,600 Geographic size: 292.43 km2

WATERLOO REGION

When region was created: 1973 Regional Chair: Karen Redman Total Population: 535,154 Number of regional councillors: 15 Lower-tier municipalities:

Cambridge

Population: 129,920 Mayor: Kathryn McGarry Regional councillors: 2 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 12,992 Geographic size: 113.01 km2

Kitchener

Population: 233,222 Mayor: Berry Vrbanovic Regional councillors: 4 Ward councillors: 10 Average number of constituents per councillor (ward and regional): 16,659 Geographic size: 136.77 km2

North Dumfries

Population: 10,215 Mayor: Susan Foxton Regional councillors: 0 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 2,554 Geographic size: 187.43 km2

Wilmot

Population: 20,545 Mayor: Les Armstrong Regional councillors: 0 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 4,109 Geographic size: 263.78 km2

Waterloo

Population: 104,986 Mayor: Dave Jaworsky Regional councillors: 2 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 11,665 Geographic size: 64.02 km2

Wellesley

Population: 11,260 Mayor: Joe Nowak Regional councillors: 0 Ward councillors: 4 Average number of constituents per councillor (ward and regional): 2,815 Geographic size: 277.76 km2

Woolwich

Population: 25,006 Mayor: Sandy Shantz Regional councillors: 0 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 5,001 Geographic size: 326.15 km2

SIMCOE COUNTY

When region created: 1843 (as Simcoe District) Warden: George Cornell Total population: 305,516 Number of regional councilors: 31 Lower-tier municipalities:

Adjala-Tosorontio

Population: 10,975 Mayor: Floyd Pinto Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 1,829 Geographic size: 372.3 km2

Bradford West Gwillimbury

Population: 35,325 Mayor: Rob Keffer Regional councillors: 1 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 4,416 Geographic size: 201 km2

Clearview

Population: 14,151 Mayor: Doug Measures Regional councillors: 0 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 2,022 Geographic size: 557.32 km2

Collingwood

Population: 21,793 Mayor: Brian Saunderson Regional councillors: 1 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 2,724 Geographic size: 33.46 km2

Essa

Population: 21,083 Mayor: Sandie Macdonald Regional councillors: 1 Ward councillors: 3 Average number of constituents per councillor (ward and regional): 5,271 Geographic size: 280.07 km2

Innisfil

Population: 36,566 Mayor: Lynn Dollin Regional councillors: 1 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 4,571 Geographic size: 284.21 km2

Midland

Population: 16,864 Mayor: Stewart Strathearn Regional councillors: 1 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 2,108 Geographic size: 26.62 km2

New Tecumseth

Population: 34,242 Mayor: Rick Milne Regional councillors: 1 Ward councillors: 8 Average number of constituents per councillor (ward and regional): 3,805 Geographic size: 274.21 km2

Oro-Medonte

Population: 21,036 Mayor: Harry Hughes Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 3,506 Geographic size: 587.08 km2

Penetanguishene

Population: 8,962 Mayor: Douglas Leroux Regional councillors: 1 Ward councillors: 7 Average number of constituents per councillor (ward and regional): 1,120 Geographic size: 25.36 km2

Ramara

Population: 9,488 Mayor: Basil Clark Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 1,581 Geographic size: 418.2 km2

Severn

Population: 13,477 Mayor: Mike Burkett Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 2,246 Geographic size: 549.75 km2

Springwater

Population: 19,059 Mayor: Don Allen Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 3,177 Geographic size: 536.2 km2

Tay

Population: 10,033 Mayor Ted Walker Regional councillors: 0 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 2,007 Geographic size: 139.07 km2

Tiny

Population: 11,787 Mayor: George Cornell Regional councillors: 1 Ward councillors: 3 Average number of constituents per councillor (ward and regional): 2,947 Geographic size: 336.93 km2

Wasaga Beach

Population: 20,675 Mayor: Nina Bifolchi Regional councillors: 1 Ward councillors: 5 Average number of constituents per councillor (ward and regional): 3,446 Geographic size: 24.68 km2 Compiled by Alexandra Jones and Emerald Bensadoun

For full list, including Oxford County, visit thestar.com