Penn Township, Johnson County, Iowa

Penn Township is a township in Johnson County, Iowa. About 31,822 people live there (2020–2024 estimate). It covers 21 sq mi (54.5 km²) of land and uses Central Time. Its local government works under another unit of government.

Penn Township in Iowa

Penn Township and its neighbors (simplified outlines). Open in OpenStreetMap ↗

Population, 2020–2024 estimate: 31,822 ± 1,276
County: Johnson County
School district: Iowa City Community School District
Land area: 21 sq mi (54.5 km²)
Type: TownshipGovernment under another
Time zone: Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income: $112,565 ± $9,902
Median home value: $332,600 ± $15,957
Water area: 1.88 sq mi (4.86 km²)
State: Iowa
Census code (GEOID): 1910393285
Coordinates (central point): 41.744009, -91.580831

Check a point in the township finder

These coordinates mark a central point for the area, not a street address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.

Cities, towns and communities in Penn Township, largest first

Coralville (city)23,234 people
North Liberty (city)21,125 people

These places’ central points lie inside Penn Township. A place can reach across the line, and its government, if it has one, can be separate from the township’s.

Bordering areas, nearest first

Newport Township3.9 mi east
Madison Township4.9 mi west
Clear Creek Township4.9 mi southwest
Big Grove Township5.5 mi northeast
Iowa City (city)6.6 mi southeast
Jefferson Township6.8 mi northwest
West Lucas Township9.4 mi south
East Lucas Township10 mi southeast

These towns, townships, cities and boroughs share a boundary with Penn Township. Distances are straight lines between central points, not driving distances.

Other townships in Johnson County, largest first

West Lucas Township10,251 people
Clear Creek Township10,095 people
Big Grove Township4,864 people
Madison Township4,645 people
Jefferson Township4,334 people
Newport Township1,988 people
Scott Township1,941 people
Oxford Township1,811 people
Fremont Township1,631 people
Sharon Township1,625 people
Liberty Township1,401 people
Washington Township1,005 people

All 20

People counts are American Community Survey 2020–2024 5-year estimates. See Johnson County for its cities, ZIP Code areas and county seat.

Sunrise and sunset in Penn Township

Longest day: 15 hours 13 minutes around June 21
Shortest day: 9 hours 8 minutes around December 21
Earliest sunrise: 5:31 AM around June 15
Latest sunrise: 7:44 AM the day before clocks go back in November
Earliest sunset: 4:35 PM around December 8
Latest sunset: 8:45 PM around June 27

Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.

Sunrise and sunset on the 15th of each month
Day	Sunrise	Sunset	Daylight
Jan 15	7:31 AM	5:00 PM	9 h 29 min
Feb 15	7:01 AM	5:39 PM	10 h 38 min
Mar 15	7:18 AM	7:12 PM	11 h 54 min
Apr 15	6:26 AM	7:47 PM	13 h 21 min
May 15	5:46 AM	8:19 PM	14 h 33 min
Jun 15	5:31 AM	8:42 PM	15 h 11 min
Jul 15	5:44 AM	8:39 PM	14 h 55 min
Aug 15	6:14 AM	8:06 PM	13 h 52 min
Sep 15	6:46 AM	7:15 PM	12 h 29 min
Oct 15	7:18 AM	6:25 PM	11 h 7 min
Nov 15	6:55 AM	4:45 PM	9 h 50 min
Dec 15	7:26 AM	4:36 PM	9 h 10 min

Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.

Before using this answer on a form

A township line is not always the line on your mail: a mailing address can name another town or post office, and school districts, ZIP Codes and tax districts follow their own lines. For taxes, voting or permits, check the full address with Johnson County or the local office.

Find the township or town where you are now or find your county.

See this area on Census.gov ↗