William Ryerson Dempsey

{{Short description|Canadian politician (1832–1914)}}

{{Use Canadian English|date=January 2023}}

{{Infobox officeholder

| name = William Ryerson Dempsey

| image =

| imagesize =

| office1 = Ontario MPP

| term_start1 = 1898

| term_end1 = 1902

| predecessor1 = John Caven

| successor1 = Morley Currie

| constituency1 = Prince Edward

| party = Conservative

| birth_date = {{birth date|1832|4|2}}

| birth_place = Prince Edward County, Canada West

| death_date = {{death date and age|1914|2|13|1832|4|2}}

| death_place = Prescott, Ontario

| occupation = Farmer

| relations =

| spouse = {{marriage |Emily Boulter|1856}}

| children =

}}

William Ryerson Dempsey (October 4, 1832 – February 13, 1914){{cite web | url=https://www.findagrave.com/memorial/59201300/william-ryerson-dempsey | title=William Ryerson Dempsey (1832-1914) - Find A | website=Find a Grave }} was a farmer and politician in Ontario, Canada. He represented Prince Edward in the Legislative Assembly of Ontario from 1898 to 1902 as a Conservative member.

The son of William Dempsey and Sarah Mikel, he was born in Prince Edward County, Upper Canada and was educated at the normal school in Toronto. Dempsey taught school for several years and then became a fruit grower and fruit dealer. He served as township reeve for six years and was warden for Prince Edward County, also serving as a justice of the peace. Dempsey was a Captain in the 16th Prince Edward Battalion during the Fenian raids. He married Emily Boulter.{{cite book |url=https://archive.org/details/canadianparliame1901unse/page/212/mode/2up |page=212 |title=Canadian Parliamentary Guide |last=Magurn |first=Arnott J |year=1901|publisher=Ottawa |isbn=978-1-4144-0141-6 }}