Markham—Stouffville (provincial electoral district)

{{for|the federal electoral district|Markham—Stouffville (federal electoral district)}}

{{Infobox Canada electoral district

| image = 250px

| caption = Markham—Stouffville is in south-central Ontario, just north of Toronto

| coordinates =

| coordinates_caption =

| coordinates_date =

| prov-status = active

| prov-created = 2015

| prov-election-first = 2018

| prov-election-last = 2025

| prov-rep = Paul Calandra

| prov-rep-party = PC

| prov-rep-party-link =

| province = Ontario

| demo-pop-ref = {{cite web |title=Census Profile, 2021 Census |url=https://www12.statcan.gc.ca/census-recensement/2021/dp-pd/prof/details/page.cfm?Lang=E&SearchText=markham&GENDERlist=1&STATISTIClist=1&DGUIDlist=2013A000435054 |publisher=Statistics Canada |access-date=February 9, 2022 |location=Ottawa |date=2022}}

| demo-area-ref =

| demo-electors-ref =

| demo-census-date = 2021

| demo-pop = 135944

| demo-electors = 103662

| demo-electors-date = 2025

| demo-area = 287

| demo-cd = Regional Municipality of York

| demo-csd = Markham, Whitchurch–Stouffville

}}

Markham—Stouffville is a provincial electoral district in Ontario. It encompasses a portion of Ontario formerly included in the electoral districts of Markham—Unionville (provincial electoral district) and Oak Ridges—Markham (provincial electoral district).

The boundaries of the provincial riding of Markham—Stouffville are identical with those of the new federal riding of Markham—Stouffville, created by the 2012 Canadian federal electoral redistribution. The provincial redistribution came into effect upon the call of the 42nd Ontario provincial election in June 2018.CBC News, [http://www.cbc.ca/news/canada/toronto/changes-to-ontario-elections-include-new-ridings-spring-fixed-date-1.3099809 Changes to Ontario elections include new ridings, spring fixed date], June 4, 2015. See also {{Citation|url=http://www.redecoupage-federal-redistribution.ca/content.asp?section=on&dir=now/reports&document=index&lang=e|title=Final Report – Ontario}}; Statistics Canada, [http://www12.statcan.gc.ca/nhs-enm/2011/dp-pd/prof/details/page.cfm?Lang=E&Geo1=FED2013&Code1=35054&Data=Count&SearchText=Markham--Stouffville&SearchType=Begins&SearchPR=01&A1=All&B1=All&GeoLevel=PR&GeoCode=001&TABID=1 National Household Survey Profile: Markham-Stouffville (2011)].

The territory of the new riding (map{{Citation|url=http://www.elections.ca/res/cir/maps2/mapprov.asp?map=35054&lang=e|title=Elections Canada Markham—Stouffville Boundaries Map and Description}}) consists of part of the Regional Municipality of York: (a) the Town of Whitchurch–Stouffville; and (b) the part of the City of Markham lying easterly of a line described as follows: commencing at the intersection of the northerly limit of Markham with Highway 48; then southerly along Highway 48 to 16th Avenue; then westerly to McCowan Road; then southerly to Highway 407; then easterly along Highway 407 to the Rouge River; then generally southeasterly along Rouge River to the southerly limit of Markham. The riding's population was estimated at 109,780 at the time of the 2012 Canadian federal electoral redistribution.2012 Redistribution: Federal Electoral Districts, [http://www.redecoupage-federal-redistribution.ca/content.asp?section=on&dir=now/reports/35054&document=index&lang=e|title=Markham—Stouffville Markham-Stouffville Commission's Report].