William H. Brown House

The Allegan Area Educational Service Agency (AAESA) is an intermediate school district in Michigan, headquartered in Allegan. Most of Allegan County is served by the Allegan Area Educational Service Agency, which coordinates the efforts of local boards of education, but has no operating authority over schools. Local school boards in Michigan retain great autonomy over day-to-day operations.

The Henry Franks House is a private house located at 535 Ely Street in Allegan, Michigan. It was added to the National Register of Historic Places in 1987.

Oakwood Cemetery Chapel is a historic chapel on Arbor Street in Allegan, Michigan. It was built in 1920 and added to the National Register in 1987.

Allegan High School is a public high school in Allegan, Michigan.

Allegan ( AL-ə-gən) is a city in the U.S. state of Michigan. Its population was 5,222 at the 2020 census. It is the county seat of Allegan County. It lies within Allegan Township but is administratively autonomous.

Pritchard's Outlook Historic District is a primarily residential historic district, roughly bounded by Park Drive, Walnut Street, Crescent Street, and Davis Street, in Allegan, Michigan. It was added to the National Register of Historic Places in 1987.

The Griswold Civic Center Historic District is a small historic district containing eight civic and religious buildings, roughly bounded by Hubbard, Walnut, and Trowbridge Streets, in Allegan, Michigan. It was added to the National Register of Historic Places in 1987.

The Downtown Allegan Historic District is a primarily commercial historic district, roughly bounded by Trowbridge, Locust, Hubbard, Brady, and Water Streets, in Allegan, Michigan. It was added to the National Register of Historic Places in 1987.

The Second Street Bridge is a one-lane, single-span truss bridge in Allegan, in the U.S. state of Michigan, that carries Second Street over the Kalamazoo River. It is a Michigan State Historic Site, a National Historic Civil Engineering Landmark, and is listed on the National Register of Historic Places. Built in 1886, the bridge replaced an earlier wooden structure. In the early 1980s, the bridge underwent significant renovation.

The Marshall Street Historic District is a primarily residential historic district located at 231-237, 335-705, and 232-630 Marshall Street in Allegan, Michigan. It was added to the National Register of Historic Places in 1987.

The William C. Messenger House is a private house located at 310 River Street in Allegan, Michigan. It was added to the National Register of Historic Places in 1987.

Allegan is a type 5 H chondrite meteorite that landed in Michigan on July 10, 1899. Allegan weighed around fifty pounds after its landing. As of 1964, it was one of only seven known meteorites to land in Michigan.