For over three decades and through the terms of seven mayors, Angus was also a popular alderman on Sault Ste. Marie's city council. With 31 years of uninterrupted service, he is the longest continuously serving council member in the city's history. Angus credited his involvement in city affairs to his supervisor at IPRI, Dr. J. M. Cameron, who promoted good citizenship as a virtue among his staff. Before running for council, Angus served as a citizen member of the city's planning board as well as vice chairman of the parking advisory committee. Angus first sought election in the 1959, running in the city's east end Ward One where both seats were vacated by aldermen running for mayor. In this race Angus established himself as an early critic of Ontario's property tax system and the need for cities to have alternative revenue sources in order to meet their responsibilities. Angus was elected with 1,798 votes, the largest vote total of any alderman in the city, a feat he would often repeat in future elections. In 1978, a redrawing of the city's ward boundaries put his residence in the more central Ward Two. Undeterred, Angus undertook what he called “my biggest campaign yet”, canvassing extensively and spending $900 of his own money to promote his candidacy in his new ward. In the end, Angus had an easy win, topping the ward with 3,848 votes - the largest total vote of any alderman in the city. He would continue to serve Ward Two for the remainder of his time in office. Between 1959 and 1988, Angus was elected, re-elected or acclaimed 15 times. He ran unopposed only once, in 1970 when he and one other candidate were acclaimed in Ward One. His long service and reputation for fairness on council resulted in Angus being often named acting mayor during the sitting mayor's absence from meetings. Angus admitted to have been approached several times to run for the mayor's job over the years but declined so he could focus on his career as a public servant and scientist. “I had one of those jobs that was challenging. It was what I wanted to do. I didn’t want to do anything else.” Asked how an accomplished research scientist found his way onto a city council for over 30 years, Angus was reported to have said “Some guys golf, some guys fish, I just dabbled around in politics.”
Issues Angus spoke against intolerance and bigotry. In what he called a “highly personal speech” to launch the city's Legion Week in 1978, Angus called on his audience to take active steps to promote understanding. “Personal commitment means actively opposing bigotry, intolerance, malice and mean-mouthing wherever you find it, in high places or low […] So I would ask you to examine your own attitudes and ask yourselves this simple question: how would I feel in his shoes or predicament? Are you prepared to walk a mile, or even 50 feet [in another person’s shoes]?” Angus was a passionate advocate for education and described public schools as “temples of the future.” He rejected a plan to cut education budgets saying “a poor bargain in teachers and a poor bargain in schools is the worst kind of bargain.” Though the issue was defeated in a referendum two years earlier, Angus pushed for another vote to add
fluoride to the city's drinking water in 1970. He faced opposition on council, but argued “the voters have been given time to change their minds and it is the council’s duty to lead.” The fluoridization referendum was again defeated in that year's election. In 1972, Angus supported a controversial proposal to increase the honourarium paid to aldermen arguing that it “should be such that people of all walks of life can afford to run, not just the wealthy or well paid.” As he did in the case of the honorarium, Angus showed concern that people of modest incomes not become priced out of political participation, arguing “If you can’t afford to lose $1,000, you shouldn’t get into (a campaign) and that’s unfortunate. In order to get your name before the public these days, you’re driven to these expensive advertising campaigns.” Angus favoured a short-lived proposal to change the city's ward system to elect an equal number of ward and at-large councillors believing that such a council would be more attuned to city-wide concerns instead of ward-specific needs. He also favoured measures to increase transparency in election donations, saying “I think it’s going to be a substantial contribution. I think it will help to keep the game tidy. I think it’s healthy for democracy for people to know who’s helping who get elected.” Angus often found himself urging fellow councillors to focus on municipal matters they were entrusted with, and leaving other matters to the other orders of government. In one example, he argued against a council motion urging the Senate to vote down the proposed federal goods and services tax in 1990. Deriding it as "an unnecessary resolution that solves a problem that does not exist," Angus was one of only two city councillors to vote against the controversial
Sault Ste. Marie language resolution in 1990. Angus later observed that the issue “generated a whole lot of heat and emotion, but it wasn’t that directly important to Sault Ste. Marie. [However, it did] earn us a reputation we don’t deserve.” In November 1991, in one of his last votes, Angus voted to recommend that the title "alderman" be replaced with "councillor." Three years earlier, describing himself as "old fashioned" and "a traditionalist" Angus had voted with the majority against such a change.
Leaving politics Saying “I think there comes a time when you should wander off the stage gracefully,” and citing a desire to slow down and enjoy time with friends, family and other pursuits, in September 1991 Angus announced that he would not seek re-election in that November's municipal election. Calling him “one of Sault Ste. Marie’s finest political figures,” a Sault Star editorial at the time lauded his style as a representative, saying “He injected a measure of reason and sanity and intellect into council debates that few aldermen past or present have been able to.” ==Honours==