District
CO-4
CO-4 · Colorado
Explore ZIP codes in U.S. House district CO-4 — in Colorado — 121 ZIP codes — 608,181 residents. Population, income, and housing at a glance.
ZIP codes
121
Population
608,181
State
Colorado
Median household income (avg.)
$79,330
Average home value
$324,164
Where is congressional district CO-4?
Congressional District CO-4 includes 121 indexable ZIP codes in Colorado on US5, with a combined ZIP-area population of about 608,181.
Larger population clusters inside this district include Parker, CO, Highlands Ranch, CO, Castle Rock, CO, Windsor, CO, and Castle Pines, CO. Open any ZIP below for full demographics, housing, schools, and nearby services.
The most populous ZIP currently listed for CO-4 is 80134 (about 77,814 residents).
Income and housing in CO-4
Across ZIPs with income data in CO-4, the average median household income is about $79,330 — about 6% above the U.S. median ($75,149).
Average median home value across those ZIPs is about $324,164.
On this page’s income ranking, ZIP 80108 is near the top at about $178,670.
What is a U.S. House district?
Congressional districts are the geographic units that elect members of the U.S. House of Representatives. District CO-4 is one of Colorado's seats in the House; boundaries are redrawn after each decennial Census.
District lines are not the same as ZIP codes, cities, counties, area codes, or TV markets. A single ZIP can touch more than one district at the edges, and US5 maps each published ZIP to a primary district code for browseability.
How to use this CO-4 page
US5 joins published ZIP profiles to congressional district codes so you can scan the district as a list of postal codes with population, income, and housing — then open any ZIP for maps, schools, commute, and climate context.
This is a place-based research view, not a voter roll, campaign tool, or live election results feed. Counts can change when geography publishes update.
ZIP codes in CO-4
Frequently asked questions
Where is congressional district CO-4?
District CO-4 is a U.S. House district in Colorado. On US5 it is linked to ZIP codes covering about 608,181 combined ZIP-area residents across 121 codes. Browse the ZIP table on this page for cities and counties.
How many ZIP codes are in district CO-4?
US5 currently lists 121 indexable ZIP codes for congressional district CO-4. Counts can change as geography publishes update.
What is the average income in district CO-4?
The average of ZIP median household incomes in CO-4 is about $79,330 (about 6% above the U.S. median ($75,149)). Individual neighborhoods vary — sort the ZIP table by income to compare.
Is a congressional district the same as a ZIP code or county?
No. House districts are drawn for representation and often cut across cities and counties. ZIP codes are postal geography. US5 links each published ZIP to a primary district code so you can browse demographics by seat.
How does US5 map ZIPs to district CO-4?
US5 joins each published ZIP profile to a congressional district code from the spatial dictionary. This page lists indexable ZIPs with that code so you can move from the district overview into local demographics.
What cities are in district CO-4?
Larger population clusters on US5 for CO-4 include Parker, CO, Highlands Ranch, CO, Castle Rock, CO, Windsor, CO, and Castle Pines, CO. Open linked ZIP pages for neighborhood-level demographics.