Dennison, Illinois

{{Use mdy dates|date=July 2023}}

{{Infobox settlement

| name = Dennison

| native_name =

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| settlement_type = Unincorporated community

| image_skyline =

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| subdivision_type = Country

| subdivision_name = United States

| subdivision_type1 = State

| subdivision_name1 = Illinois

| subdivision_type2 = County

| subdivision_name2 = Clark

| subdivision_type3 =

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| image_map =

| map_caption =

| pushpin_map = Illinois#USA

| pushpin_relief =

| pushpin_map_caption = Location of Dennison within Illinois

| coordinates = {{coord|39|27|39|N|87|35|52|W|display=inline,title}}

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| elevation_footnotes =

| elevation_ft = 577

| population_as_of = 2000

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| population_density_km2 = auto

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| timezone1 = CST

| utc_offset1 = -6

| timezone1_DST = CDT

| utc_offset1_DST = -5

| timezone2 =

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| blank1_name = GNIS feature ID

| blank1_info = 407130{{GNIS|407130}}

| postal_code_type = Postal code

| postal_code = 62423

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Dennison is an unincorporated community in Wabash Township in the northeast corner of Clark County, Illinois, east of Illinois Route 1 and north of Interstate 70.