Mechanical Engineer Salary in Illinois: Pay by Experience, City & Take-Home

A mechanical engineer in Illinois earns a median of $102,680 a year, according to the U.S. Bureau of Labor Statistics (2025). That comes out to about $49.37 an hour. Most of the field falls between $72,150 at the 10th percentile and $160,160 at the 90th, so where you land depends heavily on your experience, your metro, and the industry that signs your check.

How Illinois compares to the national median

The national median for mechanical engineers is $104,110, per BLS (2025). Illinois sits at $102,680, which is $1,430 below the national figure. That’s a gap of about 1.4 percent, close enough that, for practical purposes, an Illinois mechanical engineer earns right at the national line. The state isn’t a top-paying market, but it isn’t a discount one either.

The state mean is $111,380, which runs $8,700 above the median of $102,680. When the mean sits well above the median like this, it tells you a cluster of senior engineers, plant leads, and specialists are pulling deep into six figures while the bulk of the field clusters nearer the median. The average gets dragged up by the top of the distribution, so the $102,680 median is the more honest number to anchor your own expectations on.

Illinois employs about 11,790 mechanical engineers, which is a solid base for the role. That depth matters when you’re job hunting. More employers, spread across automotive, heavy equipment, food processing, and consumer goods, means more competing offers, and competing offers are the most reliable way to move from the median toward the 75th percentile of $130,730. The state’s manufacturing heritage keeps demand steady in places that other states would consider downstate backwaters.

Mechanical engineer pay by experience in Illinois

Experience is the single biggest lever on pay in this field. An engineer fresh out of school running CAD models and tolerance checks earns nowhere near what a senior engineer owning a product line or a plant’s capital projects takes home. Here’s how the Illinois numbers break out across the BLS percentile points.

The jump from entry to senior is steep. A 90th-percentile engineer earns $160,160, which is more than double the $72,150 an entry-level engineer makes. The first big climb happens early: moving from the 10th to the 25th percentile adds $11,650, often just by clearing your first two or three years and proving you can own a design without someone checking every dimension.

The stretch from median to experienced, $102,680 to $130,730, is where specialization pays. Engineers who pick up controls, thermal or fluid systems, FEA, or a regulated domain like medical devices or pressure vessels tend to reach that $130,730 band faster than generalists. The top step, from $130,730 to $160,160, usually requires either a lead or principal title, a move into engineering management, or deep expertise that’s genuinely hard to replace.

It helps to translate these bands into a raise timeline. The full spread from the 10th percentile to the 90th is $88,010, the difference between $72,150 and $160,160. Spread that across a typical 20-to-25-year career and it implies you should be adding several thousand dollars a year, on average, just to stay on the curve. If your pay has flatlined for two or three years while you’re still below $102,680, the data says you’re underpaid for your tenure, not that the field has stopped paying.

One caution on reading percentiles: they describe the whole Illinois field at a single moment, not one person’s path over time. A 25th-percentile salary of $83,800 isn’t only entry-level workers. It also includes experienced engineers in lower-paying industries or smaller downstate shops. So treat the table as a map of where the money sits, then match your own skills, employer, and metro against it rather than assuming years of service alone will carry you up the ladder. The half of the distribution above the median, $102,680 up to $160,160, rewards engineers who own products and capital projects end to end rather than executing tasks someone else scoped.

Mechanical engineer salary by Illinois metro

Where you work inside Illinois changes the math more than people expect. The state median is $102,680, but individual metros swing well above and below it. Here are the largest metro areas for this role, ranked by employment.

Chicago is the obvious center of gravity, with 6,900 engineers, well over half the state’s total. Its median of $102,070 runs almost exactly at the statewide figure, which is what you’d expect from a large, diversified market where consumer goods, food processing, pharmaceuticals, and industrial equipment all compete for the same skill set.

The standout is Peoria at $128,710, the highest median on the list and more than $26,000 above the state figure. Peoria is heavy-equipment country, anchored by large industrial manufacturers, and that kind of capital-intensive engineering carries senior pay bands. With 2,120 engineers, it’s also the second-largest market in the state, so the high median isn’t a thin-sample fluke. Champaign-Urbana ($101,090) sits just below the state line, shaped by the university and a smaller private base, and Rockford ($99,150) trails the pack despite a real aerospace and machining presence.

The spread between the top and bottom metros here is real money. Peoria’s $128,710 median is $29,560 above Rockford’s $99,150 for what is, on paper, the same job title. That’s a larger swing than many engineers will ever get from a single promotion, and it comes purely from geography and the employer mix in each market. Before you accept an offer, check it against the metro median, not just the statewide $102,680, because a number that looks generous against the state figure can be merely average for Peoria or genuinely strong for Rockford.

Remote and hybrid work complicates this, and often in your favor. Mechanical engineering still leans on lab, test, and floor presence, so fully remote roles are rarer here than in software-adjacent fields. But many Chicago and Peoria employers now hire engineers who live elsewhere in the state for design and analysis work, which means a downstate resident can sometimes capture a higher metro salary while paying downstate housing costs. When you negotiate a hybrid role, anchor your ask to the median of the employer’s headquarters metro rather than the town you commute from.

Employment density is also a signal of opportunity, not just pay. Chicago’s 6,900 engineers dwarf every other metro on the list, so even though its $102,070 median sits right at the state line, the sheer volume of openings gives you more shots at the experienced and senior bands. Peoria’s 2,120 jobs pair high pay with reasonable depth, which is a rare combination. Thinner markets like Champaign-Urbana, with 150 engineers, can pay well for the right role but offer far fewer chances to job-hop your way up.

Take-home pay after taxes in Illinois

Gross salary is not what hits your bank account. Illinois charges a flat 4.95 percent state income tax, so unlike states with brackets, your state rate doesn’t climb as you earn more. On top of that you pay federal income tax and FICA (Social Security and Medicare). Here’s the estimated breakdown at each career stage for a single filer taking the standard deduction, tax year 2026.

At the median, a mechanical engineer keeps $75,539 of a $102,680 salary, an effective all-in tax rate of about 26.4 percent. That’s $6,295 a month. Move up to the experienced band and you net $93,636, or $7,803 a month. A senior engineer at $160,160 clears $112,294 net, about $9,358 a month, the only stage where take-home runs well into six figures.

Here’s the comparison that actually matters if you’re weighing a relocation. The same median earnings in Texas, which has no state income tax, would net about $80,621. In Illinois you keep $75,539. That’s a gap of $5,082 a year, money the Illinois flat tax pulls out of your check that a Texas engineer keeps. Over a decade that’s more than $50,000 in nominal dollars, before you factor in any raises that widen the gap further.

Notice how the effective rate climbs even though the state portion is flat. At entry the all-in rate is about 23.0 percent; at the median it’s 26.4 percent; by the senior band it reaches 29.9 percent. Every dollar of that increase comes from the federal side, since Illinois’ 4.95 percent stays constant. That’s why a raise from $130,730 to $160,160, worth $29,430 gross, only adds $18,658 to net annual pay, the difference between $93,636 and $112,294. Roughly a third of that raise goes to taxes. Knowing the marginal math helps you judge whether a counteroffer is actually worth chasing.

The FICA line is worth a second look too. At the median you pay $7,855 into Social Security and Medicare, and that figure scales nearly in lockstep with gross pay until you approach the Social Security wage cap. For most Illinois engineers below the senior band, FICA is a larger bite than the state income tax, $7,855 versus $5,083 at the median, which surprises people who fixate on the state rate when comparing offers across state lines.

But net pay alone is only half the picture. The number that really decides your standard of living is net pay minus local housing. Texas keeps more of your gross, yet fast-growing metros like Austin and Dallas have pushed housing costs up sharply, while much of Illinois outside Chicago’s prime neighborhoods stays comparatively affordable, and Peoria pairs its high $128,710 engineering median with some of the cheapest housing in the state. Run your own offer through the Illinois paycheck calculator, then subtract what a place to live actually costs in the metro you’re targeting. To model your full federal and state filing in one place, tax tools like TurboTax can estimate your real liability before you sign.

ThePayGuide may earn a commission from links on this page at no cost to you. See our editorial policy.

How to earn more as a mechanical engineer in Illinois

The gap between the median ($102,680) and the experienced band ($130,730) is about $28,050. Closing it is mostly about the skills you stack and the employer you choose. Concrete moves that work in this market:

• Chase the Peoria heavy-equipment market. Peoria’s $128,710 median runs more than $26,000 above the state figure. Large industrial and heavy-machinery employers pay for the complexity of their products, and those roles are open to engineers willing to relocate or work hybrid downstate.
• Earn your PE license. A Professional Engineer license is the credential Illinois employers screen for on capital projects, public works, and anything that needs a stamped drawing. It’s the clearest line between a mid-band engineer and one trusted to own designs that carry legal liability, and it directly supports a move toward the $130,730 band.
• Specialize in controls, thermal, or FEA. Generalist mechanical engineers cluster around the median. Engineers who can run finite-element analysis, design thermal and fluid systems, or integrate mechanical and controls work command the experienced band because that skill set is harder to backfill.
• Build a regulated-domain niche. Medical devices, pharmaceuticals, and pressure-vessel work in the Chicago corridor pay a premium for engineers who understand the compliance side. Self-paced certificate programs on platforms like Coursera are a low-cost way to build toward CAD, simulation, or quality credentials employers actually list.
• Move into a lead or management role. The step from $130,730 to the senior band at $160,160 almost always comes with a title change, lead engineer, principal, or engineering manager. Volunteer to own a capital project or a product line end to end; that’s the work that justifies the bump.
• Pick the right industry. Heavy equipment, aerospace, and pharma pay more for mechanical engineers than smaller fabrication or consumer shops. Two engineers with identical skills can be $20,000 apart based purely on whose products they design.
• Use competing offers. With 11,790 engineers employed statewide, this is a liquid market. A second offer in hand is the fastest, most reliable raise available, often worth more than a year of internal merit increases.

Put numbers on the payoff before you commit time to any of these. Moving from the median to the experienced band is worth about $28,050 a year in gross pay, $102,680 to $130,730. A license or relocation that takes a year or two to execute and delivers even half that lift pays for itself many times over. Rank your options by how reliably each one moves you toward $130,730, and start with the cheapest, fastest lever you haven’t pulled yet, which for most engineers is a competing offer or a metro switch rather than a multi-year degree.

One more point on timing. Raises compound. An engineer who reaches $130,730 at year ten instead of year fifteen doesn’t just earn more in those five years; every future raise is calculated off a higher base. The earlier you climb out of the median band, the larger the lifetime difference, which is the real argument for being aggressive about the PE license, specialization, and offers early rather than waiting for tenure to do the work.

Job outlook for mechanical engineers in Illinois

Illinois supports about 11,790 mechanical engineer jobs, one of the deeper labor pools for the role in the Midwest. The concentration in Chicago, with 6,900 of those positions, means most hiring activity sits in a single metro that draws from consumer goods, food processing, pharmaceuticals, and industrial equipment. Peoria adds another 2,120 jobs anchored in heavy equipment. That diversity of employers is a buffer: when one sector slows, others keep hiring.

Demand for engineers who can design, test, and improve physical products holds up well even as automation reshapes the factory floor, because the work of specifying, simulating, and validating hardware is exactly what’s hard to hand off. Illinois’ manufacturing base gives the role a steadier footing here than in states that lean on a single industry. To see what’s open right now and how postings stack up against these BLS figures, browse current listings on ZipRecruiter and compare the offered ranges to the percentiles above.

Related and higher-paying roles in Illinois

If you’re already in this field, the most useful comparison is to adjacent roles in the same state. Here’s how two common neighbors pay against a mechanical engineer’s $102,680 Illinois median, using BLS (2025) figures.

A civil engineer in Illinois earns a median of $99,760, which is $2,920 less than a mechanical engineer here. A industrial engineer earns a median of $100,540, which is $2,140 less than a mechanical engineer in Illinois. Both sit just below mechanical engineering on pay, so a lateral move into either is roughly pay-neutral. The clearer path to more money in this field is climbing your own percentile ladder, from the $102,680 median toward the experienced $130,730 and senior $160,160 bands, rather than switching titles.

Frequently asked questions

Sources: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS) 2025; ThePayGuide tax modeling, tax year 2026. Last updated 2026. See our methodology.