Network and Systems Administrator Salary in Illinois: Pay by Experience, City & Take-Home

A network and systems administrator in Illinois earns a median of $100,080 a year, or about $48.12 an hour, according to the U.S. Bureau of Labor Statistics (2025). Most of the field lands between $65,650 at the 10th percentile and $157,800 at the 90th. That median runs just ahead of the national figure, and it tells you what a typical admin in the state actually takes home before tax.

How Illinois compares to the national pay

The national median for network and systems administrators is $99,130, per the BLS (2025). Illinois pays $100,080, so a typical admin here earns $950 more than the U.S. median. That gap is small, under 1 percent, which puts Illinois right in the middle of the pack rather than at either extreme.

The state mean tells a slightly different story. At $105,450, the average sits above the median, which is normal for a field with a long upper tail. A handful of senior and specialized admins pull the average up, while the typical worker earns the median figure. When you’re benchmarking your own pay, the median is the number to anchor on, because half the field earns more and half earns less.

Illinois employs roughly 9,820 people in this role, one of the larger state workforces for the occupation. That depth matters: more employers means more competition for skilled admins, and more lateral moves available when you want a raise without leaving the state.

Network administrator pay in Illinois by experience

Experience is the single biggest lever on pay in this field. A new admin running help-desk-adjacent tasks and basic server upkeep starts near the bottom of the range. A senior admin who owns network architecture, security, and cloud infrastructure sits near the top. Here’s how the percentile bands map to career stage, using BLS (2025) wage percentiles for Illinois.

The jump from entry to senior is steep. A 90th-percentile admin earns $92,150 more than a 10th-percentile one, well more than double the starting pay. Most of that climb happens in the first ten years, as you move from supporting systems to designing and securing them.

The early-career step matters most for planning. Going from the 10th to the 25th percentile is a $13,870 raise, and it usually comes from one or two certifications plus a couple of years of hands-on production experience. The 25th to 50th jump is bigger still, $20,560, and that’s the band where most admins spend their late twenties and early thirties. If your pay has stalled around $79,000 to $85,000, you’re sitting right at the early-career ceiling, and the path past it is specialization rather than tenure alone.

The experienced-to-senior band is where titles start to matter. Crossing from $128,790 to $157,800 usually means taking on architecture, vendor management, or a lead role over a team of admins. That last $29,010 step rarely comes from doing more of the same work. It comes from owning outcomes the business cares about, like uptime, security posture, or a cloud migration.

It helps to see the whole spread in one number. The distance from the 10th percentile to the 90th is $92,150, which means a senior admin in Illinois earns roughly 2.4 times what an entry-level one does. Few fields stretch that far on experience alone. For comparison, the median of $100,080 sits $34,430 above the entry figure and $57,720 below the senior figure, so the typical admin is closer to the bottom of the range than the top. That asymmetry is normal: the upper tail is long because a small group of architecture and security specialists earns far more than the middle of the field.

If you want a quick rule for self-benchmarking, map your pay to the bands above and ask what the next step requires. Sitting at $65,650 means you’re still proving you can run production systems, and the fastest raise is a foundational certification plus a year of uptime you can point to. Sitting at the $100,080 median means the question shifts from can you keep systems running to can you design and secure them, which is the work the 75th and 90th percentile pays for.

Network administrator salary by Illinois metro

Where you work inside Illinois changes your pay meaningfully. The Chicago metro holds the bulk of the jobs, but it isn’t the top payer on a median basis. Springfield, the state capital, edges it out, partly on the strength of state-government and healthcare IT. Here are the five largest Illinois metro areas for this role, per BLS (2025).

Chicago dominates on raw demand. With 6,950 jobs, the metro holds more than two-thirds of the state’s admin workforce, and its $103,170 median runs above the statewide $100,080. That combination of high pay and deep demand is rare, and it’s the main reason most Illinois admins build their careers in or around the city.

Springfield is the surprise. Its $110,600 median is the highest in the state, $10,520 above the statewide figure, on a much smaller base of 520 jobs. State agencies, hospital systems, and insurance employers anchor demand there, and the cost of living is lower than Chicago’s, so the take-home stretches further.

The lower end of the table is worth reading carefully. Champaign-Urbana pays a $85,080 median, $25,520 below Springfield, even though it’s a university town with a strong tech presence. A lot of that gap reflects the mix of roles: more junior and academic-IT positions pull the median down. Rockford sits at $92,260, below the state median, which tracks its smaller private-sector employer base. If you’re choosing between metros, the Chicago-to-Springfield axis gives you the best pay; the downstate university and manufacturing towns trade pay for a lower cost of living.

Peoria is the quiet middle option. At $102,630 it pays just above the statewide median and within $540 of the Chicago metro, on a base of 330 jobs anchored by manufacturing, healthcare, and insurance employers. For an admin who wants near-Chicago pay without Chicago housing costs, Peoria and Springfield are the two metros that make the math work. The spread across the five metros is wide: $25,520 separates the top payer from the bottom, which is a bigger gap than many admins assume exists inside a single state. Where you live inside Illinois can matter as much to your pay as a full career stage.

One caveat on the smaller metros: thin employment counts mean less negotiating power. Champaign-Urbana and Rockford each report fewer than 200 jobs, so if you want to move up without relocating, there may be only a handful of employers to target. Chicago’s 6,950 positions, by contrast, give you room to switch jobs for a raise every few years without ever leaving the metro. That depth of demand is part of what the higher Chicago median reflects.

Take-home pay after tax in Illinois

Gross salary isn’t what lands in your account. Illinois taxes income at a flat 4.95 percent, so unlike states with brackets, every admin pays the same rate regardless of earnings. Add federal income tax and FICA, and the effective rate climbs with income. Here’s the after-tax picture across the four percentile points, for tax year 2026 with standard assumptions for a single filer.

At the median, a $100,080 salary nets about $73,838 a year, or $6,153 a month. The effective tax rate runs 26.2 percent once federal, FICA, and the flat Illinois rate stack up. Entry-level admins keep more proportionally, at a 21.8 percent effective rate, while seniors at the 90th percentile hit 29.8 percent as more income falls into higher federal brackets.

Here’s the cross-state comparison that actually changes decisions. Texas has no state income tax. A network admin earning the Illinois median of $100,080 would net about $78,792 in Texas, versus $73,838 in Illinois. That’s a gap of $4,954 a year, the exact amount the Illinois flat tax pulls from a median paycheck. Over a decade, that’s nearly $50,000 in nominal dollars, before raises. It’s the clearest single argument for why some Illinois admins eye remote roles based in no-tax states.

It’s worth seeing how the effective rate climbs across the four stages, because the flat state tax hides the real progression. An entry-level admin at $65,650 keeps about 78.2 percent of gross, netting $51,321. The median earner keeps 73.8 percent, the experienced admin 71.7 percent, and the senior admin 70.2 percent, netting $110,798 on $157,800. The Illinois portion is the same flat 4.95 percent at every level, so the rising effective rate comes entirely from federal brackets and the FICA wage base. That’s useful to know when you model a raise: a jump from the median to the 75th percentile adds $28,710 in gross but only about $18,568 in net, because federal tax takes a larger bite of each new dollar.

But the tax gap isn’t the whole story. Net pay minus local housing is the number that matters. A $4,954 tax advantage in Texas can vanish fast if you land in a high-rent metro, and Illinois housing outside Chicago, in Springfield or Peoria, runs well below coastal and Sun Belt boomtown prices. Run your own figure before you assume a no-tax state leaves you ahead. Tools like TurboTax can model your real federal and state liability once you factor in deductions and filing status, and the Illinois paycheck calculator shows your per-check net in seconds.

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How to earn more as a network admin in Illinois

The percentile data shows the ceiling is high: the gap from median to 90th percentile is $57,720. Closing it is mostly about specialization, certification, and moving toward the work the business pays a premium for. Concrete steps that move pay in this state:

• Get cloud-certified. AWS, Azure, and Google Cloud credentials are the clearest path from generalist admin to the $128,790-plus experienced band. Chicago’s financial, healthcare, and logistics employers run hybrid cloud, and they pay for people who can manage it. Structured courses through Coursera map directly to the AWS and Azure certification exams.
• Layer on security. A CISSP, Security+, or CCNP Security pushes you toward roles where network and security overlap, which is where the senior 90th-percentile pay lives. Security skills are the most common reason an admin crosses $130,000 in Illinois.
• Target Chicago and Springfield. The two highest-paying metros are also the deepest job markets. Moving from a downstate role to a Chicago metro position can add real dollars at the same experience level, given the $103,170 metro median.
• Move into adjacent higher-paying roles. Computer systems analyst and software developer both out-earn network admin in Illinois (see the next section). Admins who learn scripting and infrastructure-as-code often pivot into those tracks.
• Negotiate on the median, not the offer. If you’re at the 25th-percentile $79,520 band with a couple of certifications, the data supports a push toward the $100,080 median. Bring the BLS figure to the table.
• Own a measurable outcome. Seniors in the $157,800 band are paid for results the business tracks, like uptime, a successful cloud migration, or a hardened security posture after an audit. Pick one outcome, deliver it, and document it. That story is worth more in a review than another year of tenure.

To put numbers on the upside: moving from the early-career $79,520 band to the experienced $128,790 band is a $49,270 raise, and the data says it’s achievable on skills rather than years. The two biggest accelerants are cloud and security, because they’re where the Illinois employer base, heavy on finance, healthcare, insurance, and logistics, has the deepest unmet demand. An admin who can show both, plus a track record of keeping production systems available, has a credible case for the top quarter of the range.

Job outlook for network admins in Illinois

Illinois supports about 9,820 network and systems administrator jobs, per the BLS (2025), with nearly 71 percent of them concentrated in the Chicago metro. That concentration cuts both ways. It means the deepest market and the most lateral options are in and around the city, but it also means downstate admins have fewer local employers to play off against each other.

The role itself is steady rather than booming. Cloud migration has shifted some traditional on-premises work, but it hasn’t erased demand. Employers still need people to run hybrid networks, manage security, and keep systems available, and the admins who pair classic networking with cloud and security skills are the ones in shortest supply. To see live openings and current pay across Illinois metros, ZipRecruiter lists active network admin roles by city.

Related and higher-paying roles in Illinois

If your goal is a bigger paycheck, two adjacent tech roles in Illinois out-earn network admin, and both are realistic pivots from this background. Using BLS (2025) state medians:

• Software Developer earns a median of $132,110 in Illinois, which is $32,030 more than a network administrator. That’s the largest gap of any common pivot, and it rewards admins who lean into scripting, automation, and infrastructure-as-code.
• Computer Systems Analyst earns a median of $101,570 in Illinois, which is $1,490 more than a network administrator. The pay bump is small, but the role trades some hands-on infrastructure work for business and systems analysis, which can open a management track.

Frequently asked questions

Sources: U.S. Bureau of Labor Statistics, OEWS 2025 (SOC 15-1244, Illinois state and metro wage data); ThePayGuide tax modeling, tax year 2026. Last updated 2026. See our methodology.