Illinois General Assembly - Illinois Compiled Statutes

Updating the database of the Illinois Compiled Statutes (ILCS) is an ongoing process. Recent laws may not yet be included in the ILCS database, but they are found on this site as Public Acts soon after they become law. For information concerning the relationship between statutes and Public Acts, refer to the Guide.

Because the statute database is maintained primarily for legislative drafting purposes, statutory changes are sometimes included in the statute database before they take effect. If the source note at the end of a Section of the statutes includes a Public Act that has not yet taken effect, the version of the law that is currently in effect may have already been removed from the database and you should refer to that Public Act to see the changes made to the current law.

65 ILCS 5/3.1-20-10

(65 ILCS 5/3.1-20-10) (from Ch. 24, par. 3.1-20-10)

Sec. 3.1-20-10. Alderpersons; number.

(a) Except as otherwise provided in this
Section, Section 3.1-20-20, or as otherwise provided in the case of alderpersons-at-large,
the number of alderpersons, when not elected by the minority
representation plan, shall be determined using the most recent federal decennial census results as follows:

(1) in cities not exceeding 3,000 inhabitants, 6

alderpersons;

(2) in cities exceeding 3,000 but not exceeding

15,000, 8 alderpersons;

(3) in cities exceeding 15,000 but not exceeding

20,000, 10 alderpersons;

(4) in cities exceeding 20,000 but not exceeding

50,000, 14 alderpersons;

(5) in cities exceeding 50,000 but not exceeding

70,000, 16 alderpersons;

(6) in cities exceeding 70,000 but not exceeding

90,000, 18 alderpersons; and

(7) in cities exceeding 90,000 but not exceeding

500,000, 20 alderpersons.

(b) Instead of the number of alderpersons set forth in subsection (a), a
municipality with 15,000 or more inhabitants may adopt, either by ordinance
or by resolution, not more than one year after the municipality's receipt of the new federal decennial census
results, the following number of alderpersons: in cities exceeding 15,000 but not
exceeding 20,000, 8 alderpersons; exceeding 20,000 but not
exceeding 50,000, 10 alderpersons; exceeding 50,000 but not exceeding 70,000, 14 alderpersons; exceeding 70,000 but not exceeding 90,000, 16 alderpersons; and exceeding
90,000 but not exceeding 500,000, 18 alderpersons.

(c) Instead of the number of alderpersons set forth in subsection (a), a
municipality with 40,000 or more inhabitants may adopt, either by ordinance
or by resolution, not more than one year after the municipality's receipt of the new federal decennial census
results, the following number of alderpersons: in cities exceeding 40,000 but
not exceeding 50,000, 16 alderpersons.

(d) If, according to the most recent federal decennial census results, the population of a municipality increases or decreases under this Section, then the municipality may adopt an ordinance or resolution to retain the number of alderpersons that existed before the most recent federal decennial census results.  The ordinance or resolution may not be adopted more than one year after the municipality's receipt of the most recent federal decennial census results.

(Source: P.A. 102-15, eff. 6-17-21.)