Quick answer: Go to your ad group, open the Demographics module, select the segments you want, and save. Then use bid adjustments to prioritize your best-converting demographics. Details below.
What Is Demographic Targeting in Google Ads?
Demographic targeting lets you control which people see your ads based on who they are. Per Google's Ads Help Center, you can filter audiences by age, gender, household income, and parental status, then serve different bids or creatives to each group.
How Google identifies demographic data
Google determines demographic information from three sources. First, Google Account profile data when users are signed in. Second, signals from website publishers, including social networks where ads appear. Third, behavioral estimation based on browsing activity across Google properties.
This is estimation, not certainty. Accuracy improves as Google collects more signal for a given user. Some users will always fall into "Unknown" categories.
Why demographic targeting matters for ROI
Broad targeting burns budget. You pay for impressions from people who will never buy. Demographic targeting concentrates spend on the profiles most likely to convert. Combine it with bid adjustments and you can amplify results for your best segments without rebuilding your whole campaign.
Demographic Segments Available in Google Ads
Per Google's Ads Help Center documentation, four demographic dimensions are available across Google Ads campaign types.
Age ranges
Seven age brackets: 18-24, 25-34, 35-44, 45-54, 55-64, 65+, and Unknown. Google does not allow advertisers to target exclusively to users under 18. Targeting is available in Search, Display, Video, Gmail, and Demand Gen campaigns.
Gender categories
Three options: Female, Male, and Unknown. Unknown typically accounts for a meaningful share of impressions across most accounts. Do not exclude it without data.
Household income levels
Seven income tiers: Top 10%, 11-20%, 21-30%, 31-40%, 41-50%, Lower 50%, and Unknown. This dimension is available in 19+ countries including the United States, Australia, Canada, India, Japan, and Brazil. It is only available in Display, Video, and Gmail campaigns.
Parental status
Three options: Parent, Not a parent, and Unknown. Parental status targeting is limited to Display, Video, and Gmail campaigns. It does not apply to Search.
The 'Unknown' category and audience reach
Google cannot determine demographic data for a portion of every audience. Those users fall into "Unknown." The Unknown category is selected by default for a reason. Excluding it restricts your reach substantially. Keep Unknown active at campaign launch. Let conversion data guide any exclusion decisions later.
Step-by-Step: How to Set Up Demographic Targeting
Setting up demographics takes less than five minutes once you know where to look. These steps apply at the ad group level.
Select your campaign and ad group
Open Google Ads. Navigate to the campaign you want to modify. Click into the specific ad group. Demographic targeting is set per ad group, not at the campaign level.
Navigate to the Demographics module
In the left-hand navigation panel, find "Audiences, keywords, and content." Click "Demographics." The page loads a table showing all four demographic dimensions: Age, Gender, Household Income, and Parental Status.
Choose and enable demographic segments
Click the dimension you want to configure. A list of segments appears. Check the boxes next to each segment you want to target. To exclude a segment entirely, right-click the row and select "Exclude." Exclusions prevent your ads from showing to that group regardless of other targeting.
Save your settings
Click Save. Changes apply immediately. Google begins serving your ads to the selected demographic profile. Give the campaign at least one to two weeks of data before drawing conclusions.
Optimize with Bid Adjustments
What are demographic bid adjustments?
Bid adjustments let you raise or lower your bids for specific demographic segments. Per Google's bid adjustments documentation, the range runs from -90% to +900%. A positive adjustment bids more aggressively for that segment. A negative adjustment pulls bids down.
Setting custom bids for high-converting demographics
Pull your Demographics report. Sort by cost per conversion. Identify the age bracket or income tier that converts at the lowest cost. Set a positive bid adjustment for that segment, starting at +20% to +40%. Review after two to three weeks and adjust from there.
Setting bid decreases for lower-performing segments
Find the segments with the highest cost per conversion. Apply a negative adjustment to reduce spend there. A -50% adjustment keeps you in the auction at a much lower bid. A -100% adjustment removes that segment entirely. Use -100% only after confirming underperformance across a statistically significant sample.
When to avoid manual bid adjustments (Smart Bidding)
If your campaign runs Target CPA, Target ROAS, Maximize Conversions, or Maximize Conversion Value, manual demographic bid adjustments are not supported. Google's automated bidding system overrides them. The AI optimizes bids across all signals automatically. In Smart Bidding campaigns, focus on audience composition and creative, not manual bid layers.
Best Practices for Demographic Targeting
Start with 'Unknown' included to maximize reach
New campaigns need data. Unknown users represent a real slice of potential customers. Excluding them from the start means you never learn how they perform. Include all Unknown segments at launch, then trim based on conversion data.
Layer demographics with other targeting methods
Demographic targeting alone is a starting point. Layer it with location, device type, and in-market audience segments to sharpen your reach. A 35-44-year-old parent in a high-income bracket searching on mobile is a far more precise target than "35-44" alone. Each additional layer filters toward higher intent.
Monitor performance by demographic in your reports
Open the Demographics tab weekly. Sort by conversions, cost per conversion, and impression share. Note which segments drive results and which drain budget without converting. Patterns emerge quickly when you look at the data directly.
Refine targeting based on conversion data
Avoid making changes on small sample sizes. A segment with five conversions is not a trend. A segment with 60 conversions at double your target CPA is a clear signal. Wait for statistical weight before cutting spend or increasing bids. Patience here pays off.
How Coinis Campaign Launcher Simplifies Demographic Targeting
Google Ads requires jumping between multiple menus to set demographics, bid adjustments, and creative for each ad group. That adds up fast across larger accounts.
Coinis Campaign Launcher handles your audience step inside one streamlined workflow. You define your target demographic profile once. Brand Profile analyzes your brand voice and positioning to align every creative and copy variation with that audience. No re-briefing. No copy-and-paste between tools.
AI Copywriting generates headlines, body copy, and CTAs matched to the demographic profile you set. A headline targeting household income Top 10% reads differently than one targeting a broad age range. Brand Profile keeps tone consistent across every segment you run.
One important note: Coinis publishes directly to Meta (Facebook and Instagram) today. Direct Google Ads integration is on the roadmap, not yet live. But the creatives and copy you build in Coinis pair directly with any Google Ads workflow. Build your demographic-tailored ads in Coinis. Export and upload to Google Ads. Your targeting setup in Google Ads does the rest.
The platform-specific mechanics differ. The creative quality stays constant.
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Frequently Asked Questions
Does demographic targeting work in all Google Ads campaign types?
Age and gender targeting work across Search, Display, Video, Gmail, and Demand Gen campaigns. Household income and parental status are limited to Display, Video, and Gmail campaigns. Check campaign type before relying on those dimensions.
What happens if I exclude the 'Unknown' demographic segment?
You restrict reach significantly. A large portion of Google's audience has no determinable demographic data and falls into 'Unknown.' Excluding it at launch cuts impression volume and can raise CPCs. Keep Unknown active until conversion data justifies removing it.
Can I use demographic bid adjustments with Smart Bidding?
No. Smart Bidding strategies like Target CPA, Target ROAS, Maximize Conversions, and Maximize Conversion Value override manual bid adjustments. Google's AI handles bid optimization automatically. Demographic targeting still applies to audience composition, but manual adjustment inputs are ignored.
Is household income targeting available in every country?
No. Per Google's Ads Help Center, household income targeting is available in 19+ countries including the United States, Australia, Canada, India, Japan, Brazil, and others. It is not available globally. Check availability for your target country before building campaigns around this dimension.