The city of Delavan is governed by a mayor/aldermanic form of city government consisting of six (6) elected members representing the three geographic wards of the city and the mayor who is elected by voters of the entire city. The mayor is chief executive officer of the city and leads semi-monthly city council meetings, voting on matters before the council only in the event of a tie.
Current members of the council having rotating terms of four years are: Troy Hackman (Ward 1), Sue Byrd (Ward 1), Allen Beymer (Ward 2), David Howard (Ward 2), George Mitchell (Ward 3), and Dan Kentner (Ward 3).
Delavan's City Clerk is Penny Bright. Delavan's City Treasurer is Gail Mitchell. Delavan's City Administrator is Joe Woith. Delavan's City Attorney is vacant.
Effective January 1, 2008 Liz Skinner is serving as Acting Mayor. Her mayoral term runs through April 2009.
Delavan has a consolidated public schools district (#703) which educates pre-school through high school students in different areas of a common campus environment.
"The mission of District #703 is to provide the opportunity for all students to grow and develop into well-rounded individuals. By acquiring literacy and developing sufficient skills in communications in addition to knowledge in basic academic and technical skills, they will become life-long learners. They should develop healthy lifestyles and be able to function in society as good citizens with acceptable morals and appropriate work ethics."
There were 705 households out of which 31.9% had children under the age of 18 living with them, 63.5% were married couples living together, 6.8% had a female householder with no husband present, and 26.7% were non-families. 24.7% of all households were made up of individuals and 13.2% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.06.
In the city the population was spread out with 27% under the age of 18, 7.7% from 18 to 24, 27.2% from 25 to 44, 22.7% from 45 to 64, and 15.4% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 93.9 males. For every 100 females age 18 and over, there were 93.6 males.
The median income for a household in the city was $39,063, and the median income for a family was $46,250. Males had a median income of $36,685 versus $21,435 for females. The per capita income for the city was $18,734. 5.7% of the population and 4.2% of families were below the poverty line. 5% of those under the age of 18 and 7.5% of those 65 and older were living below the poverty line.