Blatchford first sought public office in the
1921 municipal election, when he was elected to
Edmonton City Council for a one-year term as an alderman, finishing fifth out of seventeen candidates. While the top five candidates were to have been elected to two year terms, with the sixth and seventh-place finishers winning one year terms,
Bickerton Pratt, who finished seventh, won a two-year term by virtue of being from the south side of the
North Saskatchewan River, due to the guaranteed southside representation; resultingly, Blatchford won only a one-year term. He was re-elected, this time to a two-year term, in the
1922 election, in which he finished third of sixteen candidates. He resigned midway through his term to run for mayor in the
1923 election, in which he handily defeated
James Ramsey. He was re-elected with relative ease in the
1924 and
1925 elections, and did not seek re-election thereafter. As mayor, Blatchford convinced the city to purchase a farm to establish an "air harbour", which later became the
Edmonton City Centre (Blatchford Field) Airport. After his federal political career faltered, Blatchford attempted a return to municipal office by running for mayor in the
1932 election. However, he finished a distant third of three candidates, behind incumbent
Daniel Kennedy Knott and perennial candidate (and former and future mayor)
Joseph Clarke. ==Federal politics==